How Much Water Can I Change Out At One Time?

sepulatian

Moderator
Originally Posted by Tankyou
Before risking throwing my system (155 gals or so total) into a cycle? :notsure:
What do you mean? For a routine water change, or what?
 

tankyou

Member
At any time. Trates are kinda high in my DT, (20 or so ppm) and I want to bring them down b4 my fish go back in. Gonna do one big change and a few smaller ones. Just wanna know how big the big one can be, without throwing my system into a cycle.
 

sepulatian

Moderator
Originally Posted by Tankyou
At any time. Trates are kinda high in my DT, (20 or so ppm) and I want to bring them down b4 my fish go back in. Gonna do one big change and a few smaller ones. Just wanna know how big the big one can be, without throwing my system into a cycle.
You could do an 70% change and not throw your system into a cycle as long as you don't disrupt the sand bed, rock and filters. For 20ppm trates. Do you want them gone? What is in your tank now?
 

tankyou

Member
Originally Posted by sepulatian
You could do an 70% change and not throw your system into a cycle as long as you don't disrupt the sand bed, rock and filters. For 20ppm trates. Do you want them gone? What is in your tank now?
Right now the DT has a couple of cleaner shrimp, a bunch of little hermit crabs, and whatevers hiked in on my LR, mostly pistol shrimps and some small kine xanthid crabs, and yeah I'd like them gone (the trates and hitchhikers).
 

sepulatian

Moderator
Originally Posted by Tankyou
Right now the DT has a couple of cleaner shrimp, a bunch of little hermit crabs, and whatevers hiked in on my LR, mostly pistol shrimps and some small kine xanthid crabs, and yeah I'd like them gone (the trates and hitchhikers).
Is your hypo tank back up to normal salinity yet? When it is, pull out the guys you want to keep and do a drastic water change. Keep the rocks wet and there will be no dieoff. Now is the time to do it!
 

lion_crazz

Active Member
You could do a 50-70% water change without creating a cycle if you do not remove biological bacteria (by way of disturbing the sand and rock).
 
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