yes..they are the "dwarf variation. For filtration, I have a 280 emperor filter and do 80 percent water change weekly

Hi!


I have a 20 gallon tall 20 gallon devoted to petricola catfish. I have a mountain of lace rock for caves and tunnels and under that, 4 8" white pvc pipe for added tunnels. My question is this. How many petricols can i add to the tank??? I have 7 right now and I am thinking of adding 5 more ...