Ya no problem. I'm not trying to breed. I hope they don't. My ph never changes and my rotkeil is going through a growth spurt right now. My super red from jeff is happy as a clam and eating well. The notatus is starting to grow. It would be hard for me to get my ph down.
Just a quick update. My pH seems to have lowered to 6.8. It must be the RO/tap water mix stabilising it to that and also the bogwood must have had an effect.