Well, first the snails are dead now, thanks to my powerhead and my own stupidity for not realizing they'd suck onto it, so that doesn't really matter.
Second, I personally find the amount they're pooping strange, since I haven't fed them in about a week, other than a pea each yesterday.
All the media is pre-owned as well as the sand and had lots of bacteria in it, and the tank IS cycled. I have taken the water to get tested while I wait for my test kit to get here, and as of three days ago I was at 0-0-10. My goldies are small and according to aqadvisor.com, even with just the sponge filters I'm at over 400% filtration. The new AC70 is coming with the test kit, so more filtration is coming soon.