Sooo I can stop changing all 10,950 gallons of water in my facility? Excellent! lol.
Yep, just more evidence for the premise that common sense is actually so rare that it qualifies for super-power status.
But I'll bet that lazy aquarists everywhere read that and felt their hearts palpitate a little, thinking "I knew it! Changing water is baaaaad!"
I see the author of that fluff piece is a college senior "pursuing a career in ecology- and environment-oriented reporting". I wonder if he works part-time at Father Fish's LFS?

I personally go for 50% water changes instead of 80-90% because if you do a 80-90% water change the potential damage that could be done by something wrong in your tap water is more dramatic. Or in case I forget to add dechlorinator to the new water.
feed my dog 8 times per day; that way, each portion is smaller, so if I have a senior moment while preparing one of his meals and dose it with chocolate, he might not die.
A number of factors go into water changes. In some places with locally unreliable water treatment that might be true, but in my last two places (over 25 years) with consistent quality well water, high volume water changes haven't once caused an issue. I did have a problem once about 35 years ago when the local water treatment plant messed things up-- at the time I was doing twice weekly 50% water changes... it didn't help, lol, I still had a disaster on my hands, the only way I saved some fish was to put them into a tank or two I hadn't changed yet. I've always said there isn't a cosmic, one-size-fits-all water change theory and to do what works for you to keep your fish healthy.I personally go for 50% water changes instead of 80-90% because if you do a 80-90% water change the potential damage that could be done by something wrong in your tap water is more dramatic. Or in case I forget to add dechlorinator to the new water.