View Full Version : water changes- how often?

07/01/2010, 06:45 AM
Most of us are performing them, some do 10% a week, and some 10% a month. I'm sure that the right timing is different, so my question is how often should we perform them, and how much we should change every time for optimal results?

For example, I have a 65 gal reef, heavily loaded.

thx :thumbsup:

07/01/2010, 07:31 AM
Most hobbyists change out around 30% per month. Smaller water changes performed more often will have less impact on your occupants.

Randy provides more details in this article:

Water Changes in Reef Aquaria

07/01/2010, 07:38 AM
I have a 90 gallon and I change 5 gallons a week pretty regularly. I also do the wet skim when doing water changes.

07/01/2010, 09:10 AM
I would do them at least bi weekly but even better do them weekly and do 10 percent

07/01/2010, 10:05 AM
Debates on this can be endless. FWIW I subscirbe to the smaller more frequent is better school. Just seems like there is less risk of upsetting balances in the system. I change 1% daily with additional changes up to about 5% periodically related to maintenance for a total of about 40% per month.

07/01/2010, 03:39 PM
I agree that small daily changes are great, but they would require automation, in my case, because I'm lazy.

For a heavily-loaded 65g system, if you were to do 5g per week, I think that'd be very good. Less might be fine, but there's no data on which to base estimates, and tanks are likely to vary quite a bit.

07/01/2010, 03:46 PM
I perform a water change on my 75g+20g sump+5g fuge probably 10gallons every 2 weeks. I am not heavily stocked at all and I only feed once every 2 days. I set my skimmer on wet skim also and takes out probaby a full collection cup of dirty water every 24 hours.

2 small clowns
1 bicolor blenny
1 watchman goby
2 anemone's

new additions
Mandarin goby
Golden angelfish

07/02/2010, 10:14 AM
[QUOTE=bertoni;17317063]I agree that small daily changes are great, but they would require automation, in my case, because I'm lazy.


I'm too lazy to keep track and do larger changes. For me it's easier to change a bucket of water a day along with the morning feeding routine. I keep a 16 g bin of mixed sw going.