r/o di help

I bought my unit that I'm running now off of eBay. It is a Honeywell 6100DINT 6 stage RO/DI unit (no tank, no faucet) from www.filterdirect-water.com. To my door it was $103.00

Since then I've replace the ASO (auto shut off valve) once (after about 2 years). Since then I added a booster pump from them too. The booster pump was very cheap from them IMO. The cheapest around and its still runnin.

After purchasing replacement filters from www.thefilterguys.biz I realized I was saving money and getting quality filters.

Looking back I wish I didn't go the eBay route, but we live and learn ... ... after reading on Reef Central :)

It doesn't have clear housings, but I can live without them. I don't have a single pressure guage, but I watch my TDS. I've been happy with the unit in the long run and have learned from my mistakes. I can live with that.
 
A pressure gauge is the only way to tell if prefilters and to some extent carbon blocks are reaching their sediment filtering limit. Granted you should change filters every 6 months but in some cases the will not last that long and measuring the pressure drop across the filter array is the only way to tell. I actually have two permanent pressure gauges, one on the incoming tap water line and one after the last carbon block. Normally I get a 2 to 3 psi drop across the filters and I know if that goes up its time to change. Prefilters and carbons have very little effect on TDS so there is no way to use that as a guide for replacement.

I am not a huge fan of clear housings myself, they are constructed of a more brittle plastic and can fail with water hammer or if expose to sunlight. If you really want quality filters go the Spectrapure and get their absolute rated prefilters, they are much better than a nominal rated filter that only traps some of what its rating is.
 
if you dont have it already get 1 micron sed and carbon it will bring it as close to 0 tds after the membrane then the di will bring it to 0 but unfortunatly as stated before the unit has multiple problems and is more costly then to buy a good one off the bat.
 
I micron prefilters and carbons will have no effect on TDS. What they will do though is extend the life of the RO membrane by protecting it better. Only the membrane and DI have any significant effect on TDS. Prefilters take out suspended solids not disolved solids and carbons take out volatile organic chemicals and chlorine which ar normally in very small parts per billion or in the case of chlorine about 1 part per million.
 
I am using the Ocean Reef Miser. It works great, water quality is excellent. It has a 1:1.3 production to waste ratio which is the main reason for me getting this one. Water costs are quite high. I had a FD unit that I converted into a three stage DI unit.
 
It would apear that you have a 5 stage RO/DI unit ... 6 stage if you count the 2nd DI.

If you have well water, I would go with:
$19.00 - WELL WATER PACKAGE
1 POLY SEDIMENT FILTER 1 OR 5 MICRON
2 MATRIKX CTO/2CARBON BLOCK FILTERS

$45.00 - 75 GPD FILMTEC RO MEMBRANE

$6.00 - 75 GPD FLOW RESTRICTOR WITH QUICK FITTINGS

TOTAL = $70.00 (assuming you keep your DI, not incl shipping)
 
$36.00 THE TIDE SINGLE DI SYSTEM
These are refillable. These are the ones people boast most about. The horizontal type is the kind you already have.
TIDEDIBLUE.jpg


If you don't think that the DI resin inside the canisters you have is any good ... you could either get the type shown above or just buy refill bags for the ones you already have.

I have the horizontal type similar to yours. I'm satisfied with mine so far, but may upgrade in the future to the vertical type.

I hope you leave POOR FEEDBACK to the eBay guy, he must be selling trash elements. It looked like a good deal from the link, I guess you really have to know what you're looking at to know what you're buying ... it's a crying shame and perpetuates our mistrust in all eBay sellers.

It astonishes me that your unit is not capable of putting out 0 TDS. It should! And what astonishes me even more is that someone manufacturers these filter elements knowing that the quality is low.
 
The e-bay sellers are not aquarists and don't give a darn about you or your reef system. They are out to import a shipping container of cheap Chinese knockoffs and make a quick buck, thats all. Most do not have a storefront or even offer any type of real technical assistance. Ask them for a physical address and all you get is a phone number or e-mail address.
I have been in the municipal water treatment business for going on 33 years now and vendors like this come and go all the time, its just with e-bay and their lax enforcement they can get away with it easier today since they do not have to deal with the federal trade commission or federal communications commission and can't get slapped with false advertising lawsuits. If they were doing this in print or on TV it would be a different story.
 
o yea i ment the verticle one
i'm gonna order the new filters sumtime this week
thank you everyone for helping
 
100gpd membranes have a lower rejection rate than the filmtec 75gpd membranes. Go with the 75, you won't miss the extra gallons. Restrictor valve goes on the waste line and will take the place of your flush valve.
FB
 
100 GPD = 90% rejection and 75 GPD = 98% rejection rate. For every 2% you increase the RO efficiency you DOUBLE the life of the DI resin so its a major concern.
 
hey guys i got the new filters and membranes over the weekend i put em in and the first 5g i got was 1-2 pmm with out the DI
do u think if i hook up my DI's that came with the unit that it will be zero?

thnx every1 i'm very relievd now
 
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