How often to change tank water?

[marinehobbist]

How often does one need to do water change of 20% ?

[SBS_Transit]

Either once or twice a week, i change my water twice a week 20% since my bio load is low

[ervine]

Either once or twice a week, i change my water twice a week 20% since my bio load is low

bio load low still change twice a week?

[damsel-in-distress]

I think unless you have a high bioload (ie. too many fish &/or too heavy feeding = too much nutrients) or you do not have a powerful enough protein skimmer to handle the size of your bioload input, its best practice to only need to change water 10% each fortnight (every 2 weeks). I know many reefers with successful tanks only change their water maybe every month or two. Its all about regular monitoring your water parameters and making sure each level is within acceptable limits.

[jellyfish]

30% every 3 weeks on average. Always maintain my nitrate level below 40ppm. having a 100gallon tank + 20 gallon sump. Mainly LPS with only 3 yellow tail demsel & 4 domino..... seldom feed them, they'll find their own food ...

[hammy]

once or twice in a week... depending my availability.... providing happy environment so far ...

[jesperlam]

All depends on your bioload and tank parameters. Water change will replenish the loss nutrients in your water as it'll be consume by ur LPS/SPS etc.

I practise water change once every 2 wks unless the parameters real bad, i'll do it once a wk

[JustinK]

Having 5 fishes in my 2 feet. Been religiously doing 25% water change every Fri night. Bo pian, cos small tank... so far manage to keep my nitrate at 20-25ppm.

[Tigger]

10% once a week

[charlie]

Change 10% every week, cos glass panel slight stain, otherwise I'll do it fortnightly. Bo pian.

[freddychin]

I am very lazy bum and I just change 3 pails of water every Saturday for my 5 feet tank.

I have 30 over fishes and mostly are anthias

[surfedelic]

I am very lazy bum and I just change 3 pails of water every Saturday for my 5 feet tank.

I have 30 over fishes and mostly are anthias

3 pails every saturday ... you call lazy ... I changed once in a month ..... I think I ought to be shot

[marinehobbist]

Tks for all the feedbacks. Another thing is that my sand bed has lots of brown, powdery stuff. How do I get rid of them? Wish I can have a special water vaccum cleaner that can suck all the slime.

[bubble_gum]

change every week abt 25%.... no fish. lps and 1 bloodshrimp only more to replenish trace elements just change lucky my tank only 2ft

im having a bare btm tank and i vacuum the tank btm wif a syphon hose while doing water changes

[JuzzMarine]

For my 3ft cube, 20% every month.

For my 1ft nano cube, 20% every 2 days

[Yellowbelly]

I change water full every two weeks....I think that is about about 6 gallons , so far so good

[marinehobbist]

Your 6 gallons of water would be about how many percent of your tank?

[chrislwp]

30% every 6weeks.

[lightningstrike]

well...... IMHO, it all boils down to wat kind of corals u r keeping and wat's ur bio load like....... once u c nitrate levels creeping back up and staying there, do a water change immediately........

juz me 2 cents.

[ryz]

I haven't changed water in 6 months. *gulp* unorthodox. but hasn't proven to yield any undesirable effects.

[magern2]

Change water every week 10% enough, I think. If change more ofen, don have to dish out so much water.

[marinehobbist]

I think it is a good theory to do 10% change every week. I must'n be lazy and will do this starting from tomorrow.

Thanks to everyone for your contributions.

[slcw]

change once a month, though 1 lfs recommends to change a bit every week to replace trace elements exhausted. another change water once a year - yet looks good

[charlie]

30% every 6weeks.

Hi Bro,

Don't u encounter stain on the glass panel?