RO/DI websites or pricing

[justahobby]

My father is moving to leming and just had a well drilled. He's getting a pump that pushes 50 GPM. My mom and I both will be upgrading to 100+ gal aquariums in the next couple years. Offhand I would say I will need 50 gal per month for top off and water changes. I have no clue where to begin looking for one or what kind of price range would be needed. Any help would be greatly appreciated.

[caferacermike]

Buckeye Field supply. They will take care of you. A sponsor.

[SABOB]

I second Buckeye.Bought a unit over a year ago,no problems.One of the best purchases I have made since going NaClH2O

[ACE]

Buckeye Field supply. They will take care of you. A sponsor.

Got mine from Buckeye. Call or PM Russ, great guy.

[Robb_in_Austin]

What they said. Not a better deal out there really.

If your pockets are deep, splurge for the Spectrapure no waste(well, minimal) setup.

[cpreefguy]

You can also go with one of those sweet Kati Ani systems, zero waste water!

http://www.thefilterguys.biz/kati_ani_di-onizer.htm

[Bill S]

Buckeye.

[prof]

Buckeye or Melev

[Marlin]

Buckeye

[Mr_Cool]

You can also go with one of those sweet Kati Ani systems, zero waste water!

http://www.thefilterguys.biz/kati_ani_di-onizer.htm

Anyone see the "Water Saver RO/DI" systems? Looks pretty interesting.

There are two RO membranes. But, the waste water from the first feeds the second membrane. Thus, less waste water. Sounds like a good idea to me.

Probably could retrofit an existing unit to do this, too.

[caferacermike]

I've been asking about the "koldsteril" brand of filters, essentially a DI only set up years ago. Folks were bashing them back in the day. They were a "zero waste" type filter. I see now that some folks think they are the new "it".

[BuckeyeHydro]

Anyone see the "Water Saver RO/DI" systems? Looks pretty interesting.

There are two RO membranes. But, the waste water from the first feeds the second membrane. Thus, less waste water. Sounds like a good idea to me.

Probably could retrofit an existing unit to do this, too.

A word about some of these systems:

When you plumb two membranes in series (waste from first feeding the second), they act as a single long membrane. So if you plumb together two 75's, then you functionally have a 150 gpd membrane.

Regardless of membrane capacity, you probably already know that your should have about a 4:1 waste:purified water ratio.

So if you plumb together two 75's, and use a flow restrictor intended for a single 75, you'll end up with relatively more purified water and relatively less waste water. You'll be below 4:1. Will you "waste" less water? Sure.

You can do the same by over restricting (going below a 4:1) with any membrane. You could use a 75 gpd membrane with a 50 gpd flow restictor, for instance.

But you will also shorten the life of the membranes. Keep the ratio at about 4:1. Its the "waste water" (called "concentrate" or "brine") that flushes the membrane to keep it from clogging with all the funkage the membrane doesn't allow to pass through.

A funny aside: You'll see some RO systems advertised on the auction website that hype their special "self-flushing" membranes. Buyer beware. All RO membranes are "self-flushing." Its a routine part of RO technology.

Russ

[Kyle46N]

PurelyH20 is another option. I bought mine from them and its been great. Not too expensive either.