what size water change do you do?

my 60 gallon grow out gets 20% daily the rest gets it changed a lot less. i should do more but im usually too busy kinda makes me feel bad but atleast i understock even my betta gets a 5 gallon.
 
I do between 25%-40% weekly depending on how lazy I feel.
 
Lauren said:
how do you manage 100% water changes? Do you do it in stages? some this day, some the next day?
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I bring the water down to the point where it is enough to keep a few inches above the fish, and then start filling the tank as I continue to remove water from the end of the tank opposite the input. My input pump moves water just slightly faster than my python removes it. Naturally, I can't get a full 100% while letting any water remain in the tank due to the fact that I'm actually diluting the last bit of the water a few times over before filling it up, but it's close enough for me. Thus, ~100%.

I definately would never attempt this without having the preparation resevoirs for the change water to match the tank water.
 
I do 40% water changes weekly on my 50 gallon. Getting a Python changed my life in this regard- the difference between a 20% and 40% water change without a Python is significant, but with one, it's no biggie.
 
I do anyplace from 16-22 gal every 2 weeks on my 45 gal tank. Old gravel vac (drain out door to lawn or snow now) and refill with 2 gal buckets. not that hard or long to do.
 
30G - 6 Tiger Barbs and 4 Brevis = 50% Weekly
20G - 4 Platy, 4 Guppy, 5 Cory, 1 Bamboo Shrimp, 2 glass shrimp =50% Weekly
10G - 1 Betta = 50% Weekly
10G - 10 Platy Fry = 50% Weekly
I use to less untill I got the missing parts for my python. Now that it's working again total time to do all four tanks is less then an hour.
 
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