||02-22-2019 03:18 AM
You would basically have a sump/refugium under your frog tank. I’ve done this many times with no problems and with great plant growth, as long as you moniter the water quality. If done correctly, the waste from the terrarium/vivarium above can fertilize the refugium (fish tank) below..without the need for extra fertilizers...assuming the fish tank below is a planted tank and needs the extra nutrients. I wouldn’t do this for a discus tank though, as they need more stablized water.
I wouldn’t feed a mistking with “dirty” water either, for the same reason as said above ^.