We have 3 johana's in a 4x4 200g tank and for the last couple of days they have been staking out a corner under a piece of driftwood. Now what I am wondering is will thw 2 that have hollowed out a spot there spawn and raise some fry. Also what signs should we look for and is it even possible or has it been done any help or info will be great. There are other fish in the tank will that matter.