low ph

[Myka]

Originally Posted by wickedfrags.com

Maintaining consistent alkalinity is much more important than concerns regarding pH, again IME.

Agreed.

Originally Posted by grimmer

how do i maintain alk at 125 to 145

Weekly testing, and the use of a commercial buffer to raise it. If you're looking for a product name, one of my favourites is Seachem Reef Buffer 8.3 which helps keep a higher pH. If you have a fish only tank it isn't as important, but if you have corals you should try to keep your alkalinity within a 1 dKH (less than 20 ppm) swing, so this may require dosing more than once a week.