How big of water changes do you do? And, how often?

[Nanook]

IF you can put your system water volume that would be helpful.

I have 1000 gallons of saltwater and change 225 gallons every two months which is about 22% water change...probably more like 25% after accounting for liverock and overflows.

 

[saltwater creep]

325 gallons i do about 70 gallons a week to every other week

 

[JStorey]

350 gallons of volume and change about 45 gallons a week

 

[sick1166]

450 gallon 400 gallons a month

 

[mflamb]

On the 390 (510 gallons total system) I just took down, I was doing 60 gallons per week, mainly because that's the size of my saltwater mixing barrel.
I'm currently doing the 60 gallon water change weekly on my 300 Rubbermaid reef, and I'll continue that amount on the 300 (410 gallon system) that I'm currently setting up.

 

[skey44]

25 gallons every week to two weeks. 200 gallon total volume. 25-50% a month

 

[ReefingBuddha]

480g tank (550g Volume) and was doing 100g every 2 weeks, then once a month once the system stabilized, and now that I dose Grotech 3 part trace elements I haven't found a need for water changes in a couple months. The system is very stable though and there is a relatively low bio-load. Oh, and my SPS have never been happier.

 

[savethereef]

total water volume about 210 gallons with DT and sump

i change about 55g every month some times every 6 weeks.

 

[gramma royale]

200 gallons total with refugium. Tank is relatively new, but I plan on changing 1% daily.

 

[savethereef]

i hope you have some way to automate the WC of 2g per day. or some way you can replenish the new SW and dump out from the tank. because lifting water like that everyday will get tiresome. There is a guy here on the boards who automated him tank to do that everyday for him.

 

[gramma royale]

Haha, I wish I could automate it. Unfortunately my wife won't let me install anything outside of the stand, so there's no space for a water change unit.

That said, I maintain a SW reservoir in the garage and haven't had any issues making the changes thus far. I haven't timed it yet, but I'm pretty sure the change take about 3 minutes to do.

 

[bstone]

I have 1000 gallons (net) water in my system. I do a 150 gallon water change every 2 weeks.

But, I just started a continious water change that does 10 gpd, its really cool and I run it 24/7/365.

 

[Eric the half-bee]

500 gal total volume. I change 80 gal/month.

 

[93292_FishGuy]

when i had my 300 gal i did about 50 gallons a week!

 

[RyanEG]

225 gallon total system. 30-40 gallons a week, new system

 

[kelhuffman]

100 G monthly on ~450G system water.

 

[Lowredranger]

I plan to do 35g every other week on a 350g total water volume maybe weekly until everything is stabilized.

Been considering the dosing pumps set to do 2-3g a day have to do more research.

 

[Ed Reef]

300g and I do a 10% WC weekly

 

[PnoyReefeR]

total volume 240g and I do 20g a week

 

[dew2loud1]

~700 gallons, 90 gallons every two weeks or so, it would probably change if I had larger mixing container and more automation, as I'm currently carrying 90 gallons out by hand. On top of that probably 10 or so gallons a week are taken out for culture of nudibranchs and clownfish.

When we first moved the system and added 200 gallons to it (about 400-500 gallons of new water) I didn't do a water change for three months.