Get the largest RES you can....if it was me, I wouldn't put in too many, they'll be able to eat a ton of snails as they grow, and if you limit numbers, you'll have the chance to have some really large RES going forward. However, if all the fish truck has are 1-2" fish, you may want a larger number, even 100 or so, as your smallies can't distinguish between Devils Spawn [F2 HBG] and Golden Children [yoy RES].
Last edited by Yolk Sac; 09/05/13 01:42 PM. Reason: Oh yeah-the grass carp. Wouldn't add if you are feeding pellets; not a personal fan of GC and think there are better controls for vegetation esp tilapia.
