This post is very interesting!
"I" feel PH is important! You can really get into the chemistry of things, about the ability of how calcium is used vs. the level of PH.
Our oceans are dying because they are becoming huge a CO2 sink. The acidity of the oceans are rising currently just slightly and they are in trouble. So how is someone going to tell me that 7.8-7.9 is ok?
We as "Reefers, Aquarists, or Hobbyist" have a husbandry responsibility, to at the VERY least mimic the parameters that sustained the life of the animals that we have removed from their original environment.
That being said. This post got me curious, so before I opened my mouth I thought I better check my tanks
10g AIO tropical mixed reef: 8.5
13.5g surge tank, temperate: 8.35
6g temperate with canister filter: 8.3
40g tropical current build not finished running off of a 30 aqua clear: 8.32
What I do:
Overall: There is a constant breeze through the house. This is probably the biggest factor in my ph value.
Salt mix is Brightwell.
Tanks are all open top.
I run protein skimmers on all tanks. Any time you aerate the water you will naturally raise the PH.
Because my tanks are so small I manually dose Red Sea 3 part everyday at lunch. Yes I could go cheaper with bulk, but dose ML's a day so a 1000 ml bottle last a very long time.
The two Tropical tanks get Kalk added via the ATO. Normally I would not recommend adding Kalk this way but I live in SoCal which is pretty dry so my ATO pump goes off on a regular basis.
@AydenLincoln I really love my Eshopps nano skimmers, if you can fit one in your AIO mid chamber I would recommend this one.