When I started my tank, I only have one power head, now I have three, Finally I have a stable tank.
So you can't really have too high? I don't have any as such, but I have my internal filter output, which is quite high, and my external filter has a massive spray bar which runs across most of the tank, and is from a filter which is made for a tank 5X the size of mine, meaning the flow is really high. That always worried me.
Yea I have 2 PH and PH run from my Fluval canister filter up from bottom of tank ... Well I finally got my lighting situation corrected and was just checking on next step. I am going to change from instant ocean to Kent reef salt or IO Reef one. Isn't the higher your KH your salt is either bad or not enough calcium?
I don't think it's good (I don't really know about salt, i don't make my own, i buy it), but i don't think KH and salt are directly related. You should be dosing with Calcium supplements weekly anyway if you have any Shrimp, starfish or corals in your tank, as they will die when they molt if it is too low.
I think the dosing of calcium in turn raises the KH unfortunately, as anything added to your tank does (which i found out recently, and it's really annoying me!)
But i think that there isn't too much wrong with a high KH, so long as it's not too high, it won't have many adverse affects. In fact, some people have said that it increases growth in corals