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I have a 29g. If I'm having water issues, I change 5g per week. If no issues, I change 5g every two weeks.
I'm not saying I'm right at all. I'm just saying what I do. I'm not really sure if it's possible to "over-change" your water or not.
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Eric
2 green chromis
2 false perc/tr
Indigo Dotty/tr
2 button polyp
gsp
candy cane
zoa
ricordia rock
open brain
5 turbos
5 hermits
30 lb ls / 27lb lr
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