How often are you doing water changes in SPS tank?

[Dowtish]

5 gallons a week on a 100 gallon system. takes 5 minutes.

 

[trido]

10 gallons every four days on a 400 gallon system. Works out to about 20% a month

 

[Aquaph8]

25 gallons bi-weekly on a 225

 

[ritter6788]

I shoot for every 2 weeks but I've been busy so I'm shooting for once a month. I'm pushing 2 months on my water change at the moment. I don't think I've gone longer than 2 months ever on my 4+ year old tank.

 

[K_red_raider]

15 gallons a week on a 120 with a 30 gallon sump

 

[jamey1010]

With all the nifty automation we have I do 1.5 gallons every 12 hours works out to about 44% monthly on 210g