I've been getting a new 45g planted tank setup up to speed and it's been going for a month now with only 6 rummynose tetras and ramshorns snails. The tank looks great and healthy, plants are growing, no algae issues. The substrate is flourite and sand. I've been taking readings over the time it's been running and noticed that the PH is at 8. The KH is 6. I was wondering if this is going to be a problem in terms of stocking the tank. I prefer not using additives or playing with PH but don't know if this is going to be problematic...