How often do you do waterchanges on a large aquarium? (120+ gallons)

[mnavick]

Nope,no misunderstanding. Buy 1 for $37 get the 2nd box for $18.50. Forgot to mention it's Instant Ocean. Check them out under our Sponsor's. Best to call and verify Dan is still doing it.

 

[willray]

I haven't done water change in 6+ months.My parms are stable and on target, corals & inverts are still happy and the fish are doing excellent.Might not ever do another one! Coralife/IO salt in 200 gal box $50+- free shipping @ fostersmith.Tough to beat Water Worlds deal though.

 

[stevenp]

150g total system volume. I change 20g every week when I'm on top of things, every 3 weeks when I'm lazy. Probably works out to an average of 20g every 2 weeks.

 

[ljr]

I have a 178g display tank, with another 150g in the basement and I do a 50 gallon change about every month or so.