Seabuffer unto itself shouldn't affect the skimmer at all. Not sure what has happened there unless a chemical imbalance causing precip and the skimmer is trying to remove it.
As far as your newly mixed SW
is concerned, you shouldn't use buffers for a pH related problem. They also raise alkalinity at the same time and in doing so you may inadvertantly raise alk
to dangerous levels that can harm the animals.
Sounds to me like your main issue is not with the salt but with how your preparing it. If mixed properly and allowed to aerate, the pH should stabalize above 8.0 without chemical tweeking. An airstrip and the occasional stir isn't going to be enough to blow off ambient CO2
. You really need to get a powerhead in there for it to mix properly.