50% weekly water changes safe for fish?

mattmathis

I am going to start a planted tank and will be using EI dosing which requires 50% weekly water changes. I am used to changing about 25% weekly but 50% seems pretty high.

Wouldn't it be kind of rough on the fish?

Thanks!

rugie

a max of 20% each 2 weeks or 10 % each week is sufficent (unless you are having a water quality problem) if EI dosing requires 50% then I personally would not use it. plants do not like "new" water nor do they require it. an aged tank is ideal. what piqued your interest in EI dosing?

Cody

Depending on water quality and fish kept, 25-50% is fine.

For example, a lightly stocked tank 10G tank with only two to five small fish can have 25%. But a 10G tank that is heavily stocked or with fish that are messy (Puffers, Goldies, etc), should have 50%.

But I know nothing about EI dosing. But as stated, 50% should not be too hard on the fish.

jeaninel

50% no problem for fish. Not sure about plants though.

mattmathis

Thanks!!!

Kim

As long as the new water is the same pH, temp, and hardness I don't see why it would affect the fish. Actually, you'd probably have very low nitrates which is good for your fish. I can't be sure about the plants though, I'm no expert and am just happy when mine grow!

fishman09

You should only be doing 25% at the max, i would do about 15%, unless your water qualityis really bad, then do more