Water Change %

[Duffer]

Ok, gents, might be a stupid question so bare with me,

Is the % of water change for just the display tank or combine with sump?

 

[phlibbyreefer]

total system volume. display + sump

 

[doughboy]

its total. but nobody really knows the exact total volume, so it would just be a "convenient" volume, usually in increments of 5 gallon (or whatever bucket size you use) water bucket.

 

[Denisk]

Total is how I calculate. No such thing as a stupid ?

 

[Flippers4pups]

Ok, gents, might be a stupid question so bare with me,

Is the % of water change for just the display tank or combine with sump?

@duffer, no questions are stupid here.

Excellent responses above!

 

[WVNed]

I test my nitrates and if they are high I change more and low less. It works out to be 10-20% of total system but 20-30% of actual volume.

 

[jsker]

Here is a search of reef tank volume calculators link to make things easier.

The general rule is to do a 10% to %15 water change.

Some system require more some less to export nitrates and phosphates.

Once starting water changes, look at you system to see how it looks. I just adjusted up since I have been having algae issues since moving to a auto water change and my system look so much better since adjusting up two weeks ago. Nothing happen fast in reefing used by @Flippers4pups and is a good rule of thumb.

 

[Flippers4pups]

Yes nothing happens fast in this hobby!

 

[vetteguy53081]

10-20% change is sufficient. Just assure the water temp of new water going into tank is the same or tad warmer- NOT cooler. A few forum posts lately with ich right after water changes

 

[Super Fly]

I do water change based on total water volume, which u can use this to calculate, very useful
https://nualgiaquarium.com/calculate-your-tanks-water-volume/#gf_14

 

[Duffer]

Thanks guys, appreciate it

 

[WVNed]

Yes nothing happens fast in this hobby!

Nothing good.

Bad stuff seems to happen instantly. Usually because I did something stupid.

 

[dwest]

Here is a search of reef tank volume calculators link to make things easier.

The general rule is to do a 10% to %15 water change.

Some system require more some less to export nitrates and phosphates.

Once starting water changes, look at you system to see how it looks. I just adjusted up since I have been having algae issues since moving to a auto water change and my system look so much better since adjusting up two weeks ago. Nothing happen fast in reefing used by @Flippers4pups and is a good rule of thumb.

What AWC percent did you go from and to?