90 gallons damn. What is the water source ?
If you don't filter it yourself it could change. 90g you would have to, maybe a filter.

Give us more to go on insted of 20 questions.
LOC NAR on probation Reviewed by LOC NAR on probation on . ph problem in hydro set up flushed the system yesterday and today the water looks very murky and by the way the ph has allways been a problem.It allways climbs to 7.0 Rating: 5