Aquarium SystemsDr Tims Freshwater Waste Away Slow Release Gel - Lowers Nitrates & Phosphates for up to 30 days! (Large Dual 60 day)

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Size Name:Large Dual 60 day Waste-Away Time Release Gels continuously release good bacteria into the aquarium water. These good bacteria consume nitrate, phosphate and organics keeping the tank cleaner and the water clearer. Easy use - apply the provided suction cup and gel stick inside your tank, sump or filter box. Lasts up to 30 days and changes colour to indicate when they need to be replaced. Developed by Dr. Tim Hovanec (Dr Tim's!) in association with Aquarium Systems. Available in the following pack sizes - Small for tanks up to 50L - 64mm length Available as a single (30 days) or dual (60 days) pack Medium for tanks up to 120L - 102mm length Available as a single (30 days) or dual (60 days) pack Large for tanks up to 300L - 178mm length Available as a single (30 days) or dual (60 days) pack