{"title":"Dinoflagellate Control","description":"\u003cdiv style=\"width:100%;max-width:1100px;margin:0 auto;text-align:left;\"\u003e\n\u003ch2 style=\"font-size:28px;line-height:1.3;margin:12px 0 16px;\"\u003eDinoflagellates on the sand bed: what to look for\u003c\/h2\u003e\n\u003cp\u003eA brown coating on the sand bed may be dinoflagellates, but diatoms and cyanobacteria can look similar. Some dinoflagellates form a fine, dusty layer; others appear as slimy strands with trapped bubbles. Appearance alone cannot confirm what is growing in your aquarium.\u003c\/p\u003e\n\u003cp\u003eIf possible, examine a small sample under a microscope before choosing an approach. Different types behave differently, and not every outbreak responds in the same way to UV-C.\u003c\/p\u003e\n\u003csection aria-label=\"Amphidinium examples\" style=\"margin:28px 0;\"\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:24px;\"\u003e\n\u003carticle style=\"flex:1 1 420px;min-width:0;padding:20px;border:1px solid #e5e5e5;border-radius:10px;box-sizing:border-box;\"\u003e\u003ch3 style=\"font-size:24px;line-height:1.3;margin:0 0 18px;\"\u003eLarge-cell Amphidinium\u003c\/h3\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:16px;align-items:flex-start;\"\u003e\n\u003cfigure style=\"flex:1 1 160px;min-width:0;margin:0;text-align:center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0955\/0551\/4844\/files\/large-cell-amphidinium-sand-bed.png?v=1790281813\" alt=\"Brown patches on an aquarium sand bed, reported as large-cell Amphidinium.\" loading=\"lazy\" style=\"display:block;width:100%;height:220px;object-fit:contain;background:#f7f7f7;border-radius:6px;\"\u003e\u003cfigcaption style=\"display:block;font-size:13px;line-height:1.5;margin-top:10px;\"\u003eExample on the sand bed\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure style=\"flex:1 1 160px;min-width:0;margin:0;text-align:center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0955\/0551\/4844\/files\/large-cell-amphidinium-microscope.png?v=1790281826\" alt=\"Microscope image identified as large-cell Amphidinium in a dinoflagellate support group.\" loading=\"lazy\" style=\"display:block;width:100%;height:220px;object-fit:contain;background:#f7f7f7;border-radius:6px;\"\u003e\u003cfigcaption style=\"display:block;font-size:13px;line-height:1.5;margin-top:10px;\"\u003eCorresponding microscope image\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle style=\"flex:1 1 420px;min-width:0;padding:20px;border:1px solid #e5e5e5;border-radius:10px;box-sizing:border-box;\"\u003e\u003ch3 style=\"font-size:24px;line-height:1.3;margin:0 0 18px;\"\u003eSmall-cell Amphidinium\u003c\/h3\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:16px;align-items:flex-start;\"\u003e\n\u003cfigure style=\"flex:1 1 160px;min-width:0;margin:0;text-align:center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0955\/0551\/4844\/files\/small-cell-amphidinium-sand-bed.png?v=1790281833\" alt=\"Brown coating on an aquarium sand bed, reported as small-cell Amphidinium.\" loading=\"lazy\" style=\"display:block;width:100%;height:220px;object-fit:contain;background:#f7f7f7;border-radius:6px;\"\u003e\u003cfigcaption style=\"display:block;font-size:13px;line-height:1.5;margin-top:10px;\"\u003eExample on the sand bed\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure style=\"flex:1 1 160px;min-width:0;margin:0;text-align:center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0955\/0551\/4844\/files\/small-cell-amphidinium-microscope.png?v=1790281841\" alt=\"Microscope image showing several cells reported as small-cell Amphidinium.\" loading=\"lazy\" style=\"display:block;width:100%;height:220px;object-fit:contain;background:#f7f7f7;border-radius:6px;\"\u003e\u003cfigcaption style=\"display:block;font-size:13px;line-height:1.5;margin-top:10px;\"\u003eCorresponding microscope image\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:13px;line-height:1.6;color:#555;margin:16px 0 0;\"\u003eThese examples were supplied as large-cell and small-cell Amphidinium. The microscope images are not shown at the same scale and should not be used to compare cell sizes.\u003c\/p\u003e\u003c\/section\u003e\u003ch2 style=\"font-size:26px;line-height:1.3;margin:24px 0 12px;\"\u003eTargeted care for the sand bed\u003c\/h2\u003e\n\u003cp\u003eThe ReefSweep Mini (3W) and ReefSweep Medium (7W) are designed to bring UV-C close to affected areas of the sand bed. Compare their assembled lengths and choose the model that fits your aquarium. Read the product instructions and safety guidance before use.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"reefsweep-mini-uv-c-sand-bed-dinoflagellates","title":"ReefSweep Mini – Targeted UV-C Tool for Sand-Bed Dinoflagellates","description":"\u003ch2\u003eTarget Dinoflagellates Where They Grow\u003c\/h2\u003e\n\u003cp\u003eSand-dwelling dinoflagellates can be difficult to reach with a conventional in-line UV sterilizer. The \u003cstrong\u003eReefSweep Mini\u003c\/strong\u003e is designed to bring UV-C treatment directly to affected areas of the sand bed in a marine aquarium.\u003c\/p\u003e\n\u003cp\u003ePlace the treatment head directly on or just above a visibly affected area, with the opening facing the sand. The enclosed design concentrates the UV-C light on a small area while helping shield the rest of the aquarium from direct exposure.\u003c\/p\u003e\n\u003cp\u003eThe ReefSweep Mini is intended for the targeted treatment of sand-dwelling dinoflagellates, including types such as \u003cstrong\u003eLarge Cell Amphidinium\u003c\/strong\u003e and \u003cstrong\u003eSmall Cell Amphidinium\u003c\/strong\u003e. It can be used as part of a broader approach to identifying and managing dinoflagellates in your reef aquarium.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose the ReefSweep Mini?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeted sand-bed treatment:\u003c\/strong\u003e applies UV-C directly to visibly affected areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for sand-dwelling dinoflagellates:\u003c\/strong\u003e including Amphidinium types that often remain on or in the substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModular handle:\u003c\/strong\u003e supplied with two extension tubes and one connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControlled treatment area:\u003c\/strong\u003e the treatment head keeps the opening directed towards the sand.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple spot-treatment method:\u003c\/strong\u003e treat individual affected zones for approximately 30 seconds at a time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eAssemble the ReefSweep Mini using the required number of extension tubes.\u003c\/li\u003e\n\u003cli\u003ePlace the treatment head directly on or just above the affected area, with the opening facing the sand.\u003c\/li\u003e\n\u003cli\u003eMake sure the complete treatment head is submerged before switching on the UV-C module.\u003c\/li\u003e\n\u003cli\u003eHold the ReefSweep Mini in place for approximately 30 seconds per zone.\u003c\/li\u003e\n\u003cli\u003eTreat only visibly affected areas and limit each treatment session to a maximum of 60 minutes.\u003c\/li\u003e\n\u003cli\u003eSwitch off and unplug the UV-C module before removing the ReefSweep Mini from the aquarium.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eTemporarily lowering or switching off your circulation pumps can make it easier to keep the tool positioned over the selected area.\u003c\/p\u003e\n\u003ch3\u003eWhy can dinoflagellates take over?\u003c\/h3\u003e\n\u003cp\u003eDinoflagellates can gain ground when aquarium conditions favour them and other micro-organisms lose their foothold. Prolonged very low or undetectable nitrate and phosphate, a loss of biodiversity or sudden changes in maintenance may play a part. An outbreak is also possible when nitrate and phosphate are measurable; test values alone do not reveal the cause.\u003c\/p\u003e\n\u003ch3\u003eSupporting the aquarium after treatment\u003c\/h3\u003e\n\u003cp\u003eUV-C treats a selected area, but long-term management also means looking after the rest of the aquarium. Some reef keepers add a suitable bacterial culture after treatment and introduce copepods to support microfauna. Both are optional additions, not a guaranteed cure or a required dose after every session. Follow the bacterial product's directions, including any instructions about switching off UV equipment, and monitor nitrate and phosphate. Copepods need suitable habitat and food to establish.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × ReefSweep Mini treatment head\u003c\/li\u003e\n\u003cli\u003e2 × Extension tubes\u003c\/li\u003e\n\u003cli\u003e1 × Connector\u003c\/li\u003e\n\u003cli\u003e1 × 3W UV-C module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Safety Information\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo not use in acrylic aquariums (Plexiglas).\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUV-C light can damage eyes and skin.\u003c\/strong\u003e Only switch on the UV-C module when it is correctly installed, fully submerged and directed towards the sand. Never look directly at the UV-C light or at its reflection.\u003c\/p\u003e\n\u003cp\u003eDo not expose fish, corals, invertebrates, live rock or other aquarium surfaces directly to the UV-C light. Keep the plug and electrical connections dry, use a drip loop and discontinue use if the module or cable is damaged.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe ReefSweep Mini is a targeted treatment tool, not a guaranteed standalone cure for every dinoflagellate outbreak. Results can vary depending on the dinoflagellate species and aquarium conditions. Correct identification and addressing the underlying cause remain important.\u003c\/em\u003e\u003c\/p\u003e","brand":"3Dreefing-Solutions","offers":[{"title":"Default Title","offer_id":56061274816860,"sku":"3DR-REEFSWEEP-MINI","price":49.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/0551\/4844\/files\/reefsweep-mini-twee-buizen.jpg?v=1790272619"},{"product_id":"reefsweep-medium-uv-c-sand-bed-treatment-tool","title":"ReefSweep Medium – UV-C Sand-Bed Treatment Tool","description":"\u003ch2\u003eTarget dinoflagellates where they grow\u003c\/h2\u003e\n\u003cp\u003eSand-dwelling dinoflagellates can be difficult to reach with a conventional in-line UV sterilizer. The \u003cstrong\u003eReefSweep Medium\u003c\/strong\u003e brings a \u003cstrong\u003e7W UV-C module\u003c\/strong\u003e close to visibly affected areas of the sand bed in a marine aquarium. It is designed for use in \u003cstrong\u003esmall to medium reef tanks\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003ePlace the treatment head on or just above the affected area, with its opening facing the sand. The enclosed head helps direct the UV-C light towards the selected spot.\u003c\/p\u003e\n\u003cp\u003eUse the ReefSweep Medium as part of a broader approach to identifying dinoflagellates and addressing the conditions behind an outbreak. Results can differ between species and aquariums.\u003c\/p\u003e\n\u003ch3\u003eWhy choose the ReefSweep Medium?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeted sand-bed treatment:\u003c\/strong\u003e positions UV-C close to visibly affected areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7W UV-C module:\u003c\/strong\u003e supplied with an inline on\/off switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModular handle:\u003c\/strong\u003e two extension tubes, one connector and a separate handle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for small to medium tanks:\u003c\/strong\u003e approximately 60 cm tall when fully assembled.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 60 cm measurement is the \u003cstrong\u003etotal assembled height\u003c\/strong\u003e, including the treatment head and handle. It is not a maximum water-depth rating: leave enough room to grip and move the handle above the aquarium rim. The switch must remain outside the aquarium.\u003c\/p\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eAssemble the treatment head, extension tubes, connector and handle.\u003c\/li\u003e\n\u003cli\u003ePosition the head on or just above a visibly affected area, with the opening facing the sand.\u003c\/li\u003e\n\u003cli\u003eEnsure that the entire treatment head is submerged before switching on the UV-C module. Keep the switch and electrical connections dry and outside the aquarium.\u003c\/li\u003e\n\u003cli\u003eTreat the selected area in accordance with the instructions supplied with the UV-C module.\u003c\/li\u003e\n\u003cli\u003eSwitch off and unplug the module before lifting the treatment head out of the water.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eReducing the flow from your circulation pumps temporarily may make it easier to hold the head over one spot.\u003c\/p\u003e\n\u003ch3\u003eWhy can dinoflagellates take over?\u003c\/h3\u003e\n\u003cp\u003eDinoflagellates can gain ground when aquarium conditions favour them and other micro-organisms lose their foothold. Prolonged very low or undetectable nitrate and phosphate, a loss of biodiversity or sudden changes in maintenance may play a part. An outbreak is also possible when nitrate and phosphate are measurable; test values alone do not reveal the cause.\u003c\/p\u003e\n\u003ch3\u003eSupporting the aquarium after treatment\u003c\/h3\u003e\n\u003cp\u003eUV-C treats a selected area, but long-term management also means looking after the rest of the aquarium. Some reef keepers add a suitable bacterial culture after treatment and introduce copepods to support microfauna. Both are optional additions, not a guaranteed cure or a required dose after every session. Follow the bacterial product's directions, including any instructions about switching off UV equipment, and monitor nitrate and phosphate. Copepods need suitable habitat and food to establish.\u003c\/p\u003e\n\u003ch3\u003eWhat's included?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × ReefSweep Medium treatment head\u003c\/li\u003e\n\u003cli\u003e1 × 7W UV-C module with inline on\/off switch\u003c\/li\u003e\n\u003cli\u003e2 × extension tubes\u003c\/li\u003e\n\u003cli\u003e1 × connector\u003c\/li\u003e\n\u003cli\u003e1 × handle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant safety information\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo not use in acrylic aquariums (Plexiglas).\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUV-C light can damage eyes and skin.\u003c\/strong\u003e Only switch on the module when correctly installed, with the treatment head fully submerged and facing the sand. Never look directly at the light or its reflection. Do not expose fish, corals, invertebrates or other aquarium surfaces directly to UV-C.\u003c\/p\u003e\n\u003cp\u003eKeep the switch, plug and electrical connections dry, use a drip loop and stop using the module if the cable or housing is damaged.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe ReefSweep Medium is a targeted treatment tool, not a guaranteed standalone cure for every dinoflagellate outbreak. Correct identification and addressing underlying aquarium conditions remain important.\u003c\/em\u003e\u003c\/p\u003e","brand":"3Dreefing-Solutions","offers":[{"title":"Default Title","offer_id":59268805951836,"sku":null,"price":59.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/0551\/4844\/files\/IMG-7013.jpg?v=1790275452"}],"url":"https:\/\/3dreefing-solutions.com\/en\/collections\/dinoflagellate-control.oembed","provider":"3Dreefing-Solutions","version":"1.0","type":"link"}