Kevin as long as you're not doing anything crazy like adding "PH UPPer" "Perfect PH in a bottle" type stuff in it I think you should be fine. There are lots of people here with home water softeners and they do ok. I think the main concern is if your tank was at 6.5 ph and you want say 7.8, and you added PH up for days on end trying to make it climb up, then yes that would be bad. Acclimate your fish and you should be fine.