Ok, my 29 gallon contains 8 platies, 7 corydoras, 1 paradise gourami, 1 female betta, and two tetras that just won't die. I am wanting to convert it into a brackish tank. I have three other tanks: A 10g, 5g and 2.5g. What fish can I move into which tanks and which fish should I give away if I do decide to convert? My 10g contains snails and a male betta, my 5g has a pair of bettas (which i could move into the 2.5) and a 2.5 with nothing.