Sorry for the new post, I've skimmed through a bunch and want to make sure I don't cross my information. We're setting up new tanks, and want to know if a Dwarf Gourami would be alright with a single angle in a 37 gallon? The tank has a good deal of tall plant cover and a large castle (the picture in my profile). Also needed to be sure whether or not our 3 spot blue gourami would be alright with either a single krib, apisto, or dwarf in a 20 long? It has 2 caves and will be adding live plants and the large driftwood that has been in our 37 gallon for 2 months as well. There is an AquaClear 50 on this tank that we had set up on our 37 gallon for a few weeks, so between the filter and driftwood, it should be well seeded.