crustasian help

[spartanmax2]

I have a 20 gallon freshwater barb tank(with some tiger barbs), and a ranbow shark and some loachs. I was woundering is there and crustasians that could go in my tank without geting eating???

 

[alLexX]

a rainbow shark needs at least a 55 gallon ank and depending on the species of loach they could need up to 125 gallons. i dont think there are any fully aquatic fw crustaceans that wouldnt eat the fish or be eaten when the fish are adults