Water changes???

Guys, it's just occured to me that I haven't changed water in about 6 months in my year old system that's evolved a couple times over that last year.

I ran into heat problems a while back and stopped changing water cause it was already evaporating so fast.

Should I restart the practice, is it mandatory, or atleast integral to maintaining stability?


Background info:

Haven't had any sign of ammonia, nitrites, or anything voer 0.10 in nitrates in months.

Outside of trying to get calcium and alkaline steady, I really haven't had any problems with chemistry or toxins.

55 gallon tankw ith 30g sump, about 75 gals volume over all.

 

I think water changes may not be necessary but are definitely beneficial

 

theres quite a few who dont do regualr water changes. if your water is stable , youve obviously got some good things going on. if keeping corals, you need to supplement what they are using up. calcium and mag mainly. and keeping your dkh stable.

 

I agree with bluetang08.

But if you're not supplementing and it's a reef system, the corals are going to be pulling things out of the water that need to get replaced - so I would say yes, they are mandatory IF your not supplementing something. (things that I can think of off the top of my head that are needed by corals: Ca, Mg, strontium, alkalinity, etc)