Help ph crazy nuts

[midgetwaiter]

Originally Posted by fiorano

apparently my pH dropped from 8.00 to 7.15 over the course of 3 hours... is this possible or is my probe shot??? it happened after i dosed some alk i think but i didn't do much more than i normally do. how bad is this for my tank and what's the best way to fix it

What did you dose and how much? I can think of a couple ways this might happen but you would probably see a lot of white precipitate in the water. Did it get all cloudy?