I have a new aquaponics setup and need some help with a few problems. Setup CHIFT PIST   Sump pumps to grow beds, grow beds flow to fish tanks, fish tanks flow to sump 2 - 175 gallon IBC fish tanks with SLO and approx. 60 1" - 4" koi in each tank 175 gallon IBC sump tank 3 IBC grow beds with Utelite media planted with tomatoes, cucumbers, eggplants, peppers, lettuce, and spinach PH tends to stab…