I never had a top on my aquarium so it wasnt my problem. No top on the aquarium is better as it allows better gas exchange.
As far as my aquarium goes, the PH is still high but I have been able to lower the alkalinity to 9.6dKh. My PH hover around 7.6 in the day and 7.4 at night. Everything...
Fresh salt mix w/ RO/DI water = 8.18 (PH)
Aquarium water aereated for 2 hrs outside = 7.51
Aquarium water before test = 7.46
I use Oceanic natural sea salt mix
29 Gal. reef tank
45lbs Live rock
Protien skimmer
UV
Cannister filter
Water parameters:
KH = 15.7 dKH (Using a Nutrafin KH and Seachem KH tester)
Ca = 452 (Pinpoint Ca Meter)
PH = 7.32 @ night 7.15 (Pinpoint PH meter and Nutrafin PH Tester)
As far as I know and have read....... typically when...