RO/DI Unit

[jeffro]

I'll most likely be getting one from either AWI or BFS, still trying to decide whether to go with the 75 or 100gpd units. I may go with the 100gpd, as I understand I will get less water because of the temp of mine coming straight from the well. I wish I had a garage to set this up in, but I don't so it looks like it will be in my laundry room which is right next to my fish room.

[BuckeyeHydro]

Jeff - how many gallons total in your tank/fuge/sump? With that info, we can recommend a membrane for you.

There is a definite difference in the rejection rate of the different membranes, and you'll see this in the life span of your resin. Higher rejection rate = longer resin life = lower expense to you.

It is best to set up the system so that it omes on less frequesntly rather than cycling on and off frequently (like you'd see if you set fed a float valve in your sump directly from the RODI unit.

Are you on well water of city water?

If city water, do you have chloramines in your water?

Russ

[ShrimpFan]

I grabbed a WaterGeneral RO+DI dual unit off of FilterDirect to try it out. Seems like high quality platics and metal mounting bracket. Tank is good enough, but feels thin, so I'll keep my eye on that. Quality of the water is 99% for the DI 87% for the RO only (the dual unit part means that it has one output for DI for aquarium, one for only drinking water). The RO is supposed to get better one the system's been installed for a week or two. It's already improved in a couple days, so I don't doubt it.

I'm noticing some of ya'll aren't real keen on the ebay specials (of which this is one), so I'll let you know my thoughts as I continue to use it. So far I'm really pleased.

[Bill S]

What is your TDS. That's the determining factor. It should be less than 1. Typically on the fleabay units, they climb to 10-15 within a few weeks.

[ShrimpFan]

What is your TDS. That's the determining factor. It should be less than 1. Typically on the fleabay units, they climb to 10-15 within a few weeks.

Currently my TDS from the RO is 37 (supposed to get down to around 15 after the system has been in use for a bit), and from the DI is 4.

[Bill S]

Currently my TDS from the RO is 37 (supposed to get down to around 15 after the system has been in use for a bit), and from the DI is 4.

Which equals the difference between fleabay units, and Buckeye units.

I've owned THREE cheapo units. Still have one. It's under the sink. Fine for household stuff.

The Buckeye runs water for my systems.

[jeffro]

Sorry for the late reply, but I totally missed that Russ replied.

The total gallons for both of my tanks, sump included is close to 90 gallons. I do 10-15 gallons of water changes per week and another 10 or 12 gallons worth of top off per week. I won't have it on a float system, so I'll probably only turn it on once per week, maybe twice.

I have my own well, so no chloramines, but have not had my water tested other than that.

[BuckeyeHydro]

Given that, I'd go for the 75 gpd system. If you can, get yourself a small, unpressurized storage container with a lid for the di water.

Russ