what size water change do you do?

[Lauren]

Just currious. What size and frequencies are your water changes?

I do 20% every two weeks in my 20 and 10 gallon and 10% weekly in my 45. I'd do more in the 45g, but when the water input nozzle for the filter gets above the water line it causes wicked currents.

 

[jonathan03]

I do about 20% weekly. Its a lot, but it seems to be working well.

 

[Lauren]

not too much, some people recomend 25% at least once a week.

 

[kveeti]

It's different for each tank. My 10 gallon doesn't show nitrates (I have to add them as KN03) so I do 25% just to do a water change.

In my 28 gallon, testing over several weeks determined that it takes approx 30% to keep my nitrates under 10. Every few months I retest to see if my water change levels need to be increased or decreased, but usally it stays pretty much the same.

 

[terror]

for me , i do 40 % water changes weekly in my 85 gallon tank and 200 gallon tank

 

[fishpoor]

40% weekly

 

[Rebgen]

25% a week for my 12 gal. due to high nitrates. Once my 55 gal. is stocked I'll probably do the same regimen. Both tanks are/will be moderate to heavily planted.

 

[RTR]

I do 1/3 to 1/2 volume partials weekly, depending on the tank.

 

[Raskolnikov]

~20% 2 x week on my 30g
~100% weekly on my 55g
~100% weekly on my 75g
~30% weekly on my 210g

Water is heated, treated with Prime, and aged at least a day before I change. There is minimal to no difference in the pH or temperature of the changewater, and I've noticed improvements after switching over to larger water changes. Unfortunately, I can't prepare enough water at one time to do larger changes on the big tank.

 

[Lauren]

how do you manage 100% water changes? Do you do it in stages? some this day, some the next day?