I know I am going to hear about over crowding... there is a long story behind the one tank....
Bottom line is I want to swap fish between tanks to try and provide a better environment for the two.
My 20 gallon is really over run with plants, water sprite and java moss or fern, not sure which (it started as a 'lawn' I bought from petco). This leaves very little room for the rainbows. Yeah, i could take the plants out which i do from time to time: I cut them back.
My empire gudgeons, which are more laid back and hide a bit more i think would be perfect for the 20 gallon. Meanwhile I can move these Australian rainbows to the 29 gallon which is more open.
the plan is to catch as many fish at one time out of each tank and acclimate them to the other tank. Any stragglers I can catch and move later. Compatibility isn't much of a problem.
The question is, standard acclimatization procedures ok in this? Or would I do better just to do this transfer gradually?