Hello..........I have read all 3 pages and I am newer at this than you are, so I'm stepping out on a limb to say this:-/. IMO you could benifit your tank by moving your rocks away from your glass, and making sure you have as many opening for your fish and for water flow. You have 4 great PH's but check their directions. Try placing 2 of them pointing toward the front glass at an angle where the water flow from each connect about 3-4 inched from the glass. And of course follow the direction from our fellow 3reefers;D. Now GO! CONQURE! Sue from Salem, Or.