Works great with my saltwater nano aquariums! I have a 28G nanocube and a 7.5 rimless cube (both fluted). Nano reef aquariums need clean water all the time, and a polyester filter helps with that! I change the dose every other day on my 28G and about every three days on another small tank. I don't use it in my 75G FW tank and wouldn't recommend it for a FW tank as I only use a filter sponge and I clean it every 3-6 months (it's in my Aqua Clear 110 filter). , but that's a whole other story. I bought this 14 ounce bag on Tuesday 15th April 2014 and have some left over so it's very economical (so it's been 5 months now). Instead I just bought an 8 ounce pack and it should last a long time too. I definitely recommend it for marine aquariums. For your health!
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