Hello, I am just starting my flood and drain system. My system cycled, and I added some gold fish to start with. My PH was 6.8. Ammonia 0, Nitrites 0, Nitrates 40, KH 0. I am amazed at how fast my plants are growing in the grow beds compared to my soil garden. I added enough Potasium Bicarbonate to raise KH to 4. But now the PH is 8. How do the experienced Aquapons keep the PH and Carbonates at a…