Yah I own a generic RO unit (without DI). Outputs 4tds water and I am fine with that.

+1. Aquasafe would be the cheapest option and produces 0 TDS water ;) Fixing it with the line in a rented place might be a bit of a challenge. Just have a peak at all the possible location's under the sink pipes; if its copper, it will be a problem since you will have to pierce it; if its flexible pipe, the line can be easily fitted. Another "portable" option would be to have a faucet connection but that might reduce the pressure through the unit.

Not so, all taps should have threaded fittings and you can get a tee fitting to branch off any existing line.

Yah but it might be rusted at the joint or not easily accessible and trying to open it might not be a good idea in a rented place. The kitchen sink in my apartment has copper fitting so I didn't dare to touch that. The sink in the toilet was flexible and yet I had tough time to open the threaded fitting (probably I am the one who opened the thread since it was fitted, maybe a decade ago :razz:)

I couldn't imagine hauling water from any LFS, I guess with smaller tanks it's an option but I would think over time getting a RO/DI unit would be a much cheaper option.

I mix about 100Gal of fresh salt water every two weeks for water changes. Dragging that much water around from a LFS would be..well impossible for me.

I watched a guy load up a 5g jug of ro/di water onto a 2 week electric scooter at a lfs

I have only got a 29 biocube so it's only a jug once a week, just toss it in my car and whenever I pass by I just get it filled up so it works for m right now. Iv got some feelers out for a 2nd hand ro/di unit. It's hard when ur a student, student loans don't allow for saltwater supplies ha ha :p

There is one for sale here in red deer, Martin (modular led) cheap to just needs new cartridges.

http://www.canreef.com/vbulletin/sho...d.php?t=102882

so i must fess up ... the water purchased from big als was right on the money ha ha, my hydrometer is way out to lunch. just tested the tank with the refract. its reading at 1.029. whats the best way to get it doown to normal? just slowly add fresh water over the next few days?

You can slowly add fresh water so long as you take out tank water as well. If you only dump in fresh water your salinity will go down, but then it will just go right back up again when the water evaporates. Remember, salt doesn't evaporate :-)

Yeah I been lazy lately and getting my water from them. 4 Different times now and every time they are low 1.020- 1.022. I checked it with my refractometer. I asked them at big als and they didn't know you had to adjust their refractometer once and a while. So no more water from them.:lol: