I do water changes Everyday!
It's not as hard as it use to be tho,
I Have a long hose that reaches way outside for Drainage with alot of different Nozzles so as to prevent any spread of diseases should one tank every develop one.
And a refill hose hooked up in my bathroom for Refills,
No bucket hauling that way, But still pretty Much takes hours most every day,
Good exercise and I really enjoy it!
Actually alot have betta's
I have more Betta's occupying tanks then Other fish, But then males do need to be housed by themselves. :)