Water Change Frequency and Amount

[Cscultho]

I've had my 32g bio cube for over two years now.

5 - fish
Mostly Sps coral and a couple soft

I've been paying close attention to the needs of my system and trying to react accordingly, but my RSR 4-part seems to have stabilized my system which is GREAT.

My current water change schedule is once a week ~5g / 32g and every 3rd week I will do a larger water change ~10g / 32g. Ive noticed when I do the larger water change my soft corals do not respond well and as a matter of fact some have even receded and died. I keep the tank alk at the same level as the redsea salt I use but I'm starting to think large water changes do more harm than good. Maybe I'm losing a lot of biodiversity?

Anybody else notice this same phenomenon?

 

[kvansloo]

I was always told to do 10 percent water changes. 10 percent of 32 gallons is 3.2 gallons 5 should not hurt, but would not do more than that unless you have catastrophic failure.

 

[ChrisfromBrick]

I've had my 32g bio cube for over two years now.

5 - fish
Mostly Sps coral and a couple soft

I've been paying close attention to the needs of my system and trying to react accordingly, but my RSR 4-part seems to have stabilized my system which is GREAT.

My current water change schedule is once a week ~5g / 32g and every 3rd week I will do a larger water change ~10g / 32g. Ive noticed when I do the larger water change my soft corals do not respond well and as a matter of fact some have even receded and died. I keep the tank alk at the same level as the redsea salt I use but I'm starting to think large water changes do more harm than good. Maybe I'm losing a lot of biodiversity?

Anybody else notice this same phenomenon?

You're probably making your parameters swing more than the tank likes. try doing that amount once every 2 weeks or do 3 gallons weekly instead of 5.

 

[chip shop]

Always been a big believer in water changes,I do 25%every 2 weeks and have done for 30 years people say I don’t need to and I get that but it’s always worked for me just make sure you’re replacing like for like

 

[Crabs McJones]

Ive always followed 10% once a week. Sundays were my day

 

[AlanS]

I've had my 32g bio cube for over two years now.

5 - fish
Mostly Sps coral and a couple soft

I've been paying close attention to the needs of my system and trying to react accordingly, but my RSR 4-part seems to have stabilized my system which is GREAT.

My current water change schedule is once a week ~5g / 32g and every 3rd week I will do a larger water change ~10g / 32g. Ive noticed when I do the larger water change my soft corals do not respond well and as a matter of fact some have even receded and died. I keep the tank alk at the same level as the redsea salt I use but I'm starting to think large water changes do more harm than good. Maybe I'm losing a lot of biodiversity?

Anybody else notice this same phenomenon?

10% a week is good. But the longer you've been doing this, the harder it is to stay on schedule.