sen5241b
Reef enthusiast
Not enough water changes and water quality goes bad. Too great a percent is changed out during a routine water change and beneficial bacteria may be reduced too low. So, what is the maximum safe water change out? 50%?
Maximum Percent Water Change Out?
- Thread starter sen5241b
- Start date
reeffreak
Reef pro
It more the shock from water chemistry difference(pH,temp,salinity etc) than the beneficial bacteria.99% of the bacteria post cycle is coating the rocks,sand,glass and other equipment.They are not removed during a waterchange.Yes,50% is the most I hear the most.Although,I prefer smaller 10-25%.Doing 50% at once,I feel will expose to many of my corals to air for maybe too long.
ccCapt
Reef Hacker
I agree with reeffreak. 50% would be about the max I would do, but you can do a 50% change every 2-3 days.
ZOOT098
Reefing newb
i do 10% once a week and all parameters have been great
only time i do more is if there is a problem
the most ive ever been advised to change at once is 50%
but not as regular maintenance
only time i do more is if there is a problem
the most ive ever been advised to change at once is 50%
but not as regular maintenance
yote
In Memoriam
The most I've ever changed at once was a little over 75%.But that was on my first salty tank and I wouldnt attempt it now.
I'd even be a little skiddish about doing 50% now.
I'd even be a little skiddish about doing 50% now.
dustin_P74
Reef enthusiast
i wouldnt do a 50% water change regularly but if emergency's arose thats as much as i would do at one time
Rcpilot
Reef enthusiast
I overdosed my nano with buffer and the water turned milky white instantly.
I did about 30 water changes 3g each over the course of 24hrs. Thats like 2000% :mrgreen:
Didn't hurt a thing. The tank would have been worse off if I HADN'T done that.
I did about 30 water changes 3g each over the course of 24hrs. Thats like 2000% :mrgreen:
Didn't hurt a thing. The tank would have been worse off if I HADN'T done that.
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ccCapt
Reef Hacker
What happened there was the calcium precipitated out of solution. As long as there was no pH spike up or down, nothng would be affected anyway. In 24 hrs or less all the precipitate would settle. You would then have to test your ca, alk and mag to get the levels back up, since it's all calcium carbonate now and it won't re-dissolve.
This is somewhat common for SPS keepers who try to push their levels to the max and get them all out of whack.
JAG107
Reef enthusiast
A little OT--My neighbor told me when he moved in 3 yrs ago he kept 50% of his water and carried the tank in, said "I was too lazy to go get salt water from the LFS" and dumped 50% FRESH TAP WATER in and wondered why everything died within a week. HE also claimed to have 8 yrs experience with saltwater. hmm.
Bifferwine
I am a girl
I would only do 50% in an emergency situation. Any time else, I'd stick with 10% to 30%.
sen5241b
Reef enthusiast
I'm sticking with 20 to 25% changes.
lightcs4
Loving to learn
I do 10% weekly, but would be willing to do 25% if it was urgent, 50% max and then only if I was desperate.
cthegame
Reef enthusiast
Lucky i never had to do anything more than 25%. But i would do up to 50%-75% if it got out of control. Of course at that point, my livestock would be in a QT.
Piggy
Reef enthusiast
The most I did was a 60 gallon one. But only because I treated for flatworms and I had hundreds if not thousands of them. But usually I do 10%.
shadowsfox
^.^ Fish Lover
I'm voting 20% cause it works for me.
