I had a customer come in the other day with algae bloom problems, so first thing I ask her is how often she changes the water. She said she only changes it twice a year; she takes all the fish out, completely cleans the gravel and the filter media. Turns out she'd been doing this for seven years! I just stared at her like 
It was just something little like a 30 gallon with a couple angels and some tetras and whatnot, and those poor fish had been living in those conditions for all those years. She didn't want to listen to me when I said she should be doing it once a week, 'cause she's "been doing it like this for years with no problems..." ....except for all the algae bloom problems...


