I need a bit of help here with a perplexing problem. I have two plants in a bubbler system suspended in a 60-liter tank in 2x 6-inch pots with a Hailea Aco 9810 silent air pump and two big airstones. Air temperature 70-73 degrees Fahrenheit Nutrient Temperature 67 - 70 degrees - Ph 5.8 - 6.2. I...