PH level in reef tank

[kanapillyc]

I have 55 gallon tank with fish and Couple of cleaner shrips and sanils. The PH level is at 7.5 for long time. What is the optimum ph level? The Ammonia unddetectable,no Nitrite and Nitrate 10.
any suggesions?

 

[kmatysek]

Proper Ph level is 8.1-8.4. You should also be checking alkalinity. 'Alkalinity' is different than Ph (it's not how alkaline the water is). It's a measure of the 'buffering' capability of the water, which is what maintains a healthy Ph. I'm a newbie, but I check alkalinity (and calcium as well) and have generally been able to maintain proper water parameters with weekly 10% water changes plus topping off with a re-mineralizer additive, such as AragaMIGHT, which adds back calcium, buffers and trace elements. The only exception was a brief bout when our alkalinity and calcium dropped (probably due to coralline algae and coral growth zapping the calcium supply temporarily).