:thinking: I could use some advice on high PH in my 40 gal tank. It has been up and running well for 1 1/2 years. amonia 0, nitrite 0, nitrate always under 20, saline 1.023-1.025, 2 powerhead on a undergravel filter, Bak Pak 2r skimmer, wisper power filter, 4 inch CC substrate, reg water...