How much water for a water change?

[Malibu361]

Just curious, what does everyone recommend or change for a 90 Gal. tank ....

 

[Will C]

I change 10% weekly (including sump volume) and everybody is happy with great parameters. I haven't hade to dose

 

[jhart]

10 percent a week is perfect , for you total volume. what salt do you use? what kind of livestock do you plan to keep? Do you plan to dose? If you dont dose, I recommend a salt with high calcium such as Reef Crystals , if you plan to keep corals. and dont plan to dose, but you'll religiously do your water changes weekly.

 

[salt-rookie]

At LEAST 10%, more is good.

 

[Will C]

I recommend a salt with high calcium such as Reef Crystals

good call on the salt - w/ 10% (or greater) weekly WC your salt is critical (is it ever not) and the WC is easier than at a greater volume

 

[D1J8Z]

Try doing a 20-25 gallon water change bi-weekly

 

[NDY]

10 Gallon is Good But Weekly

 

[Malibu361]

Thanks guys, I usually do about 15-20 Gallons weekly and if I get lazy every other week ...and I use Reef crystals

 

[NYReefer]

A lot depends on the bio load also and the skimmer.. i change 10% every 7-10 days and i only have 2 small fish and a cleanup crew feed them every other day.. corals are another story i have too many which is y i bought a larger tank :splitspin never had to dose anything.. i stopped testing my parameters also because everytime i did the numbers were basically the same..