The api kits are expired, aren't they? If so, you should take the salifert results as true. Nitrate is going down, so that's good. Magnesium is fine, so there goes that theory....Fish are all good. Snail unknown. His door is closed and I haven't seen movement since yesterday morning.
Tests today...
Ph - API 8.3
Salifert 7.8
Nitrate - API 0
Salifert 25
Phosphate -1.0
Alkalinity - 14.5
Magnesium - 1140
I hate the difference between the two tests.
Triton test going out tomorrow.
If the snail hasn't moved in 24 hours, then maybe you should take it out so it doesn't add to the problem.