Than't because in Abbottsford you guys use a different water source. In Metro Vancouver the water quality is pretty consistent, with slightly higher TDS following major rainstorm events. I use straight New West tap water and I'm pretty happy.

Thats true. But anything above 1 ppm is to much for me

Which water to use is a matter of priorities. Tap water in the GVRD is generally good enough for a reef, unless it isn't on some particular occasion.
Construction or some other form of contamination could wipe out your whole tank. Maybe tomorrow, maybe in 20 years.
If you have 2 x $5 frags and a damsel, maybe it doesn't matter. If you have $500 worth of coral that you've grown from frags, maybe it matters.
So for the cost of a RO unit, you eliminate that possibility. It's peace of mind.

Sure, nobody wants to spend an extra $200, but if it saves your tank one day, you gotta think it's worth it.

+1

+1
Lots of people try to control what goes in there tanks, why add an unknown variable when you don't need to and have the "what if" variable

By running ro you know your water is good and you're not leaving anything to chance.

I don't live in surrey but every time I've used only tap water (low Tds) I've always had issues with algae. Best purchase i made IMO is my vertex ro/di unit

Also you don't need to spend ~400$ on an ro/di filter, there's a few companies out there with very reasonably priced entry level filters

Yep, I have the same unit. Spending over $300 on a maintenance item sure isn't as fun as buying fish and coral. It's pretty much a necessity if you are aiming for success and the long haul. Heck, i've had that much in coral and fish die on me multiple times in the past

thanks all ,
so who can give ma 70 gallon RO/Di water ? :)

Maybe an RO water store. Trade them for some money :)

If you want to use RO, buy a unit. After the 70, you'll need some more for water changes. Bumming water might get old after a while.

ro water
 

that's about 14 pails of water-i can filter that in one day.bring some buckets with lids by

yea sure ill buy a RO filter asap and ill come by to pick up soon
Thanks Bill