Hi. Im thinking of switch out some fish from my 17 gallon tank. Currently having 2 cherry barbs 2 otos and 3 corys. Was planning to get more of all of them but its heavy planted and my corys pellets its so crunchy and all over the place that starting become algaes. So moving the corys to a bigger tank. My though was to get like 4 cherrys and some tiger barbs. Would that work? and if not . How many tiger barbs would fit in a 17 gallon? also do i have to move my other 2 barbs? and can the otos still be in the tank with the tigers?