Sudden Alkalinity Drop

[KennyKen]

So after 4 more go's, i got a 3, 5, 6 and 7 reading.
This is an API test kit, any suggestions on a more accurate test kit. Elos?


so even if my alkalinity is some what normal.
What would cause my zoos to close up like this. I have them do this before, and it was indeed low dKh. Nitrates, ammonias and nitrites all 0

pH? i just ran out of that test kit