, I would try it. Not sure what kind of water system you have for $4000 but if the TDS
is on the low side and Phosphate is nil you will be fine.
I ran a FO
tank on tap water for 7+ years. I do use RO
water now for my reef but I had no issues until my reef was started. If you get a cyano
problem then you can start doing water changes with RO
to resolve the problem.
Sounds like you want to try it that way anyway. RO
water is the best but there are people that don't use it.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,