Doesnt matter wat size coz we all want to keep healthy gfs growing to biggest potential. So plan using large size as a guide. Also gfs grow very fast.

I feed 2 or 3 times a day. If prone to floating then its a water issue too. Wat filter u using?

Agree with kflai on adding salt only when treating for sickness. But some people do recommend adding a little, maybe 0.1% or less?

Happy gfishing