{"product_id":"methylene-blue","title":"METHYLENE BLUE","description":"\u003cp data-path-to-node=\"2\"\u003eEIHO Methylene Blue is a highly concentrated, pharmaceutical-grade treatment designed to protect your fish from a variety of common external ailments. It acts as a powerful anti-fungal and anti-parasitic agent, specifically targeting persistent issues like egg fungus (\u003ci data-path-to-node=\"2\" data-index-in-node=\"269\"\u003eSaprolegnia\u003c\/i\u003e), white spot (\u003ci data-path-to-node=\"2\" data-index-in-node=\"295\"\u003eIchthyophthirius multifiliis\u003c\/i\u003e), and common gill diseases. Whether you are managing a freshwater setup or a marine tank, this zinc-free formula is a staple in the \"medicine cabinet\" of professional breeders and hobbyists alike.\u003c\/p\u003e\n\u003cp data-path-to-node=\"3\"\u003eBeyond just treating infections, EIHO Methylene Blue plays a unique role in respiratory health. It is exceptionally effective at improving oxygen circulation within the fish's bloodstream. This makes it an invaluable tool for reducing the effects of Nitrite (\u003cspan class=\"math-inline\" data-math=\"NO_2\" data-index-in-node=\"259\"\u003eNO2\u003c\/span\u003e) toxicity—often called \"brown blood disease\"—which can occur after long periods of transportation or in newly set-up tanks where the biological cycle is still stabilizing.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"4\"\u003eWhy You Need This\u003c\/h3\u003e\n\u003cp data-path-to-node=\"5\"\u003eWe’ve all been there—you spot a fuzzy patch on a clutch of eggs or notice your favorite fish struggling to breathe. Here is why EIHO Methylene Blue is the reliable fix for those stressful moments:\u003c\/p\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,0,0\"\u003e\u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"0\"\u003eProtect Your Next Generation:\u003c\/b\u003e It prevents fungus from spreading across fish eggs, ensuring a much higher hatch rate for breeders.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003e\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eCombat Labored Breathing:\u003c\/b\u003e If your fish are gasping at the surface due to Nitrite (\u003cspan class=\"math-inline\" data-math=\"NO_2\" data-index-in-node=\"82\"\u003e$NO_2$\u003c\/span\u003e) spikes, this helps their blood carry oxygen more effectively.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eStop the \"Itch\":\u003c\/b\u003e It targets skin sliminess and mass white spot infections that cause fish to scratch against decor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,3,0\"\u003e\u003cb data-path-to-node=\"6,3,0\" data-index-in-node=\"0\"\u003eSafe Shipping Recovery:\u003c\/b\u003e It acts as a mild sedative and metabolic booster for fish arriving after a long journey, easing their transition into a new home.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"7\"\u003eInstructions\u003c\/h3\u003e\n\u003cp data-path-to-node=\"8\"\u003eUsing Methylene Blue is straightforward, but because it is so effective, you want to follow these steps to keep your main tank's balance intact:\u003c\/p\u003e\n\u003col start=\"1\" data-path-to-node=\"9\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,0,0\"\u003e\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003ePrep Your Space:\u003c\/b\u003e It is always best to use a separate quarantine or \"hospital\" tank. Methylene Blue is a strong dye and will stain silicone, light-colored gravel, and equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,1,0\"\u003e\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003eShake it Up:\u003c\/b\u003e Give the bottle a good shake to ensure the concentration is even.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,2,0\"\u003e\u003cb data-path-to-node=\"9,2,0\" data-index-in-node=\"0\"\u003eDose the Water:\u003c\/b\u003e Add 1 capful (5ml) for every 50 liters of water. This creates a concentration of approximately 2mg\/L.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,3,0\"\u003e\u003cb data-path-to-node=\"9,3,0\" data-index-in-node=\"0\"\u003eMonitor and Repeat:\u003c\/b\u003e For persistent diseases, you can add an additional dose on the 4th and 7th days. For hatcheries, additional doses on the 3rd and 5th days help keep eggs pristine.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,4,0\"\u003e\u003cb data-path-to-node=\"9,4,0\" data-index-in-node=\"0\"\u003ePause Filtration:\u003c\/b\u003e Remove any activated carbon and turn off UV sterilizers during treatment, as these will remove the medication before it can work.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cblockquote data-path-to-node=\"10\"\u003e\n\u003cp data-path-to-node=\"10,0\"\u003e\u003cb data-path-to-node=\"10,0\" data-index-in-node=\"0\"\u003eExpert Tip:\u003c\/b\u003e Think of Methylene Blue like a \"blue bath.\" If you have a fish with a specific fungal patch, you can perform a short 30-minute \"dip\" in a separate bucket at a slightly higher concentration before returning them to their tank. This provides a concentrated burst of healing without staining your entire display.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch3 data-path-to-node=\"11\"\u003eFAQ\u003c\/h3\u003e\n\u003cp data-path-to-node=\"12\"\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"0\"\u003eIs EIHO Methylene Blue safe for my plants?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eNo, Methylene Blue is quite tough on live plants and will likely damage them. We recommend using this product in a bare-bottom hospital tank or a dedicated breeding container rather than a lush aquascape.\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eWill this affect my biological filter?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\"\u003eYes, it can be harmful to beneficial bacteria like \u003ci data-path-to-node=\"13\" data-index-in-node=\"90\"\u003eNitrosomonas\u003c\/i\u003e and \u003ci data-path-to-node=\"13\" data-index-in-node=\"107\"\u003eNitrobacter\u003c\/i\u003e. To keep your cycle safe, always treat your fish in a separate quarantine tank so your main filter remains healthy.\u003c\/p\u003e\n\u003cp data-path-to-node=\"14\"\u003e\u003cb data-path-to-node=\"14\" data-index-in-node=\"0\"\u003eIs it safe for shrimp and other invertebrates?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"14\"\u003eWhile Methylene Blue is generally safer than copper-based medications, it should still be used with caution around sensitive shrimp. Always move the affected fish to a separate treatment area to avoid any risk to your clean-up crew.\u003c\/p\u003e\n\u003cp data-path-to-node=\"15\"\u003e\u003cb data-path-to-node=\"15\" data-index-in-node=\"0\"\u003eHow do I get the blue color out of my water after treatment?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"15\"\u003eThe easiest way is to perform a series of water changes and re-insert high-quality activated carbon into your filter. The carbon will \"soak up\" the remaining pigment quite quickly.\u003c\/p\u003e\n\u003cp data-path-to-node=\"16\"\u003e\u003cb data-path-to-node=\"16\" data-index-in-node=\"0\"\u003eCan I use this for both Saltwater and Freshwater fish?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"16\"\u003eAbsolutely! It is highly effective for both environments. Just remember that in reef tanks, the staining property can be permanent on porous \"dry rock\" or \"live rock,\" so the quarantine tank rule is especially important here.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"17\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"18\"\u003eEIHO Methylene Blue, fish fungus treatment, aquarium parasite medicine, egg fungus prevention, nitrite toxicity treatment fish. aquatic anti-fungal, white spot remedy, fish respiratory aid, zinc-free methylene blue, quarantine tank medicine, discus breeding supplies\u003c\/p\u003e","brand":"EIHO","offers":[{"title":"Default Title","offer_id":54009419956499,"sku":null,"price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/3342\/5939\/files\/ChatGPTImageMar24_2026_02_43_00PM.png?v=1775375825","url":"https:\/\/www.eiho.com.sg\/products\/methylene-blue","provider":"EIHO","version":"1.0","type":"link"}