I agree, but I think at this point a water change would probably be lethal. She's old school country and does not hesitate to pull a fish out of her pond and throw it in an aquarium or vice versa. She had more oscars at one time, but ran out of room for them as they matured, so there's now 5-6 tiger oscars in her pond. She traps minnows to feed the oscars in the tank. Always interesting talking to her about her tanks. She's not oblivious to the chemistry going on, in fact far from it... she just does what works for her.