How often do you do water changes?

[Pescador]

I'm about the same as Joe, 50g change once a month on my 220.

[ponokareefer]

I do a 25 gallon water change every-other week on a 125 gallon system. I used to do weekly 3 gallon water changes on my 33 gallon. I miss those days. But the bigger tank is way better!

[Snappy]

I do 20 gal biweekly which is about 10% of my total water capicity, (more like 15 - 20% if all the rock is put in the equation). I used to do 20 gal weekly on 160 gal but I started to think that was a waste of my time and switched to biweekly after I plumbed in my refugium. The system certainly hasn't suffered from it.

[Kabong]

Hey!
where's the not as often as i should option!

[crystalz]

10gal every 2 to 4 wks on a 77 with a 30 gal sump/fuge

[crystalz]

10gal every 2 to 4 wks on a 77 with a 30 gal sump/fuge. A good sized fuge with lots of macro algae has taken me from having to do weekly water changes to not even 'having' to do them when I do. Couldn't imagine ever having a tank without a fuge now that I have one.

[reefan]

Originally Posted by crystalz

10gal every 2 to 4 wks on a 77 with a 30 gal sump/fuge. A good sized fuge with lots of macro algae has taken me from having to do weekly water changes to not even 'having' to do them when I do. Couldn't imagine ever having a tank without a fuge now that I have one.

Water changes help replenish trace elements so even if the water seems to be ok it's still a good idea to do them on occasion

[andrewsk]

340 gallon system. 45 Gallon Automated Change weekly.

[SeaHorse_Fanatic]

I like doing the one big water change every 3 months compared to the small water changes every 2 weeks or monthly. Last water change was late September, then I just did a huge one this weekend. Originally planned on doing 90g on a 210g reef, by draining water from the fowlr, siphoning reefwater into the fowlr & then topping up the reef with new water. Unfortunately, I miscalculated & ended up draining too much out of the fowlr which caused me to have a near empty sump so I had to make up another 40 gallons for the reef. So, in total, just did a 130g water change on the 210g reef with 75g sump (total water volume minus LR & LS etc. is probably 180-190g).

On the other hand, I run a RS250 skimmer, Phosban reactor, semi-remote deep sand bed, micron sock, and grow lots of macroalgae in the refugium/sump so the water quality was still surprisingly good despite a long time between water changes and a high bioload/feeding regimen. The corals look the same (very good) before & after the water change, whereas in the past, usually they look a lot happier after a water change. Hmmmmm.

I'm not recommending this water change schedule for everybody, just posting up what works for me.

Anthony

[Tom R]

ZEOvit users are instructed to do a 6% water change every week. My system consists of 425G + sump and I do 30G every 3 to 4 weeks.

Tom R