I have an Aqua Clear 70 that I'm using on my fresh water 55 gallon tank. I've been reading where you don't really need the charcoal unless you're medicating. Right now I'm using the sponge, the biomax and one unit of the chemi pure elite. This is only for up to 40 gallons but if I put two bags in, it seems to be a bit too much. I was wondering if anyone uses the Aqua Clear 70 and what types of media you use. Oh, I also started using a layer of the aquarium floss in-between the biomax and the chemi pure too. Thanks for any input and ideas on what to use. My water is still cycling. It seems endless and the water seems to cloud up a lot. I don't know if this is also normal with the cycling process. It is about 4 or 5 weeks now.