Water Changes

[Thomalop]

I have a 75 gallon tank with a 30 gallon sump. For a total volume of 105 gallons.

Can I do two water changes of ten gallons each and have the same effectiveness of one 20 gallon water change?

Tank is 5 weeks old.

Thanks

[Bebo77]

best to do small water changes every week so that every month it totals 30% changes...

for example IMO on a 100 g system i would do a 10g water change every 10 days ( you will get tired of doing water changes every 4-5 days) lol.. trust me...

[BurntOutReefer]

I'm hitting 40% monthly (10% per week)....smaller mor efrequent is better then one large.

[dileggi]

Originally posted by Thomalop
I have a 75 gallon tank with a 30 gallon sump. For a total volume of 105 gallons.

Can I do two water changes of ten gallons each and have the same effectiveness of one 20 gallon water change?

Tank is 5 weeks old.

Thanks

I just read an article under the "New to reef central look here for answers". It's under the water change link and it discusses doing a big water change vs. several small water changes vs. indeinite water changes. That might help answer you best.