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Any suggestions on what to put in my 2 emperor 400 media holders? I have a fluval 404 also with pre-filter, bio max, ammonia remover and zeo carb in it.
Filter floss (otherwise known as polyfill). Does a great job of polishing the water & gives your good bacteria lots of room to colonize on. Any big chain store (like walmart) sells bags of it super cheap. Just make sure you get plain poly & not the flame-retardant stuff.
If you use filter floss, it just needs to rinsed in old tank water once a week. It doesnt disintegrate but it clumps so some extra needs to be added on a rare occasion.