How many fish in a 50?? :)

[Aquattro]

Well, water probably won't mix before bed time, and I have to crash soon. I've added some prime, and also added about 20lbs of rock. And a power head aiming at the surface to keep O2 up....
I have 2 foam blocks in the filter, but got all OCD on them last night and squished out all the muck. Shoulda left it alone or done only one. right now I have about 40 pounds of rock and the 2 foam blocks, so the bacteria should recover soon enough, but the next few days will need lots of water