ph test gone bad??
So I use the api test kits and also have a seachem ph thing hanging in the tank. Tested ph just now and it was off the charts bright blue. That's the opposite of what I've been getting lately, ph has been dropping a little lower than I like. I have new controsoil, so high ph doesn't add up. Tested with another bottle and got what I expected, 6.3.
The test isn't expired by any means, not for years. What could cause this??
Also, I don't like the ph dropping as low as it has. I use buffers, but it just goes down. Afraid I'm gonna lose my bacteria