thanks for all the input. this is going to be a FOWLR
tank, and i am checking the SG
with a floating hydrometer. like i said, i have left about 6 inches to the top of the tank, so i am assuming that once i add 140 lbs of rock, i will either have to take some water out before it overflows, or add more salt water because i am too low. so either way i know that i will have to adjust my sg
, but i too thought that 1.023 - 1.025 is ok. please advise. also, how accurate are the floating glass hydrometers? i thought since it was more expensive than the ones with the floating needle, that it would be more accurate.