How often do you change your water?

Wyvern

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10 gallons a week 109gal Bow.

If I vacuum out my sump's skimmer section, I do 15 gallons.
 

jgsolo32

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I have a 3 month old 20 gallon Cube and Monday is my water change and maintenance day. It's set.
 

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burningmime

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I am doing 50 gallons every 2 weeks on a ~250 system. So that falls roughly in line with the 10% a week other people say. But salt (and DI resin) aren't cheap.
 

Sony Ph

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I have a 13.5 gallon tank that has been running for almost two years and a 40 gallon tank that has been running for just under a year. I got in the habit with my 13.5 gallon tank of changing the water every Thursday because of how the parameters could change so quickly. I also do this every week on my 40 gallon tank. I was curious to see how often everyone changes their tank water. Sometimes I think i can let my 40 gallon go a little longer but i get paranoid because I am on such a routine.
I change 5 gallons every Sunday on my 55 gallons tank.
 

ReefGeezer

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Rough average is 10% per week. I'm not consistent though. Sometimes it's 20% per month. My relatively young tank does better with more frequent water changes.
 

ncjeepguy75

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I change my water about once a month in my 100 gallon tank...here are the readings as of today which is at the month and 1 week mark since last water change...I have been dosing neo nitrogen to keep the nitrates up a little to hopefully help my goniopora recover from a low nutrient stretch while I was on vacation...
Screenshot_20210923-145133_Aquarium Note.jpg
 

attiland

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On 40g AIO about 20% Every 1.5 to 2 months since I have a algae reactor. And mainly because of sand cleaning.

the change is reall based on evaporation. Once 50l has been topped up I set a bigger maintenance up hence the irregular pattern.
 

Lesnano30_

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10 gallons every other week on my redsea 425xl I don't mess with my sandbed and do changes out of the sump
 

reefer_evo5

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I have a 13.5 evo tank and a IM Fusion 10 gallon and i do 2.5 gallon water changes on each tank once a week and its kept everything stable so far
 

NashobaTek

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My 125 is going on 2 yrs old and I have never changed the water. I top off only. I tested my parameters and they're as follows.

Ammonia-0
Nitrite- 0
Nitrates-10
Specific gravity-1.025
Temp.-79°
Phosphate-4 still a little high
Ph-7.9 could be higher
Calcium-480

Only have one coral and it's a toadstool, doing great.
 

PITA TANK

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10 gallons a week. Waterbox 90.3. Tanks only couple months old. Few softies 4 fish. Ph drops pretty quick. So have 15g on hand if needed
 

ZoWhat

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10% on the 1st and 15th of every month

Consistent WCs hedge off soooooooo many problems, it ridiculous not to.

A natural wild reef does constant WCs to the tune of trillions of gallons a water a day....

Those that preach little to no WCs are just fooling themselves

 
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