My PH is stuck between 7.9 and 8.0 !

[ivasawajin]

no matter what i do its around 7.9 at night and 8.0 in the day . my alk is 11dkh ( it was 15 ten days ago ) my cal is 520-540 my mag is 1160 and . but when i add brightwells PH+ or another supp that only increases the PH it will go to 8.3 and then drops to 8.0 in an hour . my tank is 4 months old and i never had this problem , i added around 5 -6 corals in 3 weeks and 4 pieces of LR (around 8-9 KG) . can that change anything ????

 

[geoj]

Might be extra co2 from bad gas exchange. If the house is stuffy and or you have a glass lid on the tank or a load of waste decomposition
I would also try and do some water changes and see if that does better if so then you may need to look at how you dose and what.

 

[btldreef]

What type of salt are you using?
What type of test kit do you have?
Have you had the tests double checked by a LFS?

 

[ivasawajin]

my salt is Red Sea Pro Salt and my test kits are Elos and JBL , but i have a PH Controller . i does have a Calcium Reactor though . my tank deasnt have a lead and i have 2 big powerhead poiting toward the surface making two Huge waves from the opposite sides of the Tank .any other Ideas?

 

[btldreef]

I think your reactor might not be regulated properly