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Search took 0.08 seconds. Search: Posts Made By: Unresistible Blue
Forum: Lighting, Filtration & Other Equipment 09/10/2006, 05:01 AM
Replies: 23
Views: 706
Posted By Unresistible Blue
I think Jim meant a "DI Bypass" rather than an...

I think Jim meant a "DI Bypass" rather than an "RO Bypass."
Forum: Lighting, Filtration & Other Equipment 09/10/2006, 04:53 AM
Replies: 23
Views: 706
Posted By Unresistible Blue
The difference between your storage vessel and a...

The difference between your storage vessel and a pressure tank is that your vessel is not pressurized, and that it is presumably made of HDPE - so the DI water doesn't come into contact with the...
Forum: Lighting, Filtration & Other Equipment 09/09/2006, 11:22 AM
Replies: 23
Views: 706
Posted By Unresistible Blue
Does your system store DI water, or RO water in...

Does your system store DI water, or RO water in the pressure tank?
Forum: Chicagoland Marine Aquarium Society (CMAS) 08/29/2006, 08:42 PM
Replies: 10
Views: 229
Posted By Unresistible Blue
Randal - you hit on the two things I thought of...

Randal - you hit on the two things I thought of first as well.
Forum: Saltwater Enthusiasts Association of St. Louis (SEASL) 08/20/2006, 05:35 PM
Replies: 5
Views: 326
Posted By Unresistible Blue
Assuming all your measurements were taken...

Assuming all your measurements were taken carefully, after haveing let the system run for a bit:

Your membrane is rejecting about 90% of the tds in the feed water - that's ok, assuming you have a...
Forum: Delaware Reef Club (DRC) 08/20/2006, 11:10 AM
Replies: 17
Views: 263
Posted By Unresistible Blue
So as far as I can understand the situation, you...

So as far as I can understand the situation, you are thinking that either the housing or the cartridge were opaque white, and now one of the is clear.

I suggest you not worry about the color of...
Forum: Saltwater Enthusiasts Association of St. Louis (SEASL) 08/20/2006, 06:16 AM
Replies: 5
Views: 326
Posted By Unresistible Blue
Re: Ro/di Water

Before you replace all your filters, some probably needlessly, give us the tds readings in three locations:

tap water tds?
post RO (pre-DI) tds?
post DI tds?

how long have your prefilters...
Forum: The Reef Chemistry Forum 08/20/2006, 06:13 AM
Replies: 17
Views: 641
Posted By Unresistible Blue
The Cat GAC tends to be high in fines and needs...

The Cat GAC tends to be high in fines and needs to be rinsed thoroughly. Remember that of course you wouldn't want to run the rinse/flush water into a later stage in your system.
Forum: Saint Louis Area Saltwater Hobbyists (SLASH) 08/20/2006, 06:03 AM
Replies: 11
Views: 352
Posted By Unresistible Blue
Re: RO options

Hmm. I'm confused. If you configure your system with two 100 gpd membranes, you'll have a 200 gpd system.

If you use a single 50 gpd membrane - you'll have just that - a 50 gpd system.

So -...
Forum: Lighting, Filtration & Other Equipment 08/20/2006, 05:58 AM
Replies: 30
Views: 538
Posted By Unresistible Blue
Yes - post DI water, even with brand new resin,...

Yes - post DI water, even with brand new resin, can, and often will be above 0 ppm tds. Once the resin is exhausted - if you leave it in the system - tds coming out of the resin can be HIGHER than...
Forum: Delaware Reef Club (DRC) 08/20/2006, 05:25 AM
Replies: 17
Views: 263
Posted By Unresistible Blue
The most widely used membranes, made by Filmtec,...

The most widely used membranes, made by Filmtec, are rated at 50 psi, 77 degrees F, and 250 ppm tds feed water. Other brands name membranes commonly are spec'ed at 60 psi.
Forum: Delaware Reef Club (DRC) 08/20/2006, 05:23 AM
Replies: 17
Views: 263
Posted By Unresistible Blue
Why are you limiting the flow to the unit? If...

Why are you limiting the flow to the unit? If you didn't limit flow, what would be your water pressure?
Forum: Delaware Reef Club (DRC) 08/20/2006, 05:21 AM
Replies: 17
Views: 263
Posted By Unresistible Blue
Might your memory be clouded a bit - White DI...

Might your memory be clouded a bit - White DI resin? Hmm. Not that I'm aware of.

As far as tubing - use 1/4" LDPE tubing (low density polyethylene).
Forum: Lighting, Filtration & Other Equipment 08/20/2006, 05:13 AM
Replies: 6
Views: 213
Posted By Unresistible Blue
Re: RO/DI pressure problems

Because the unit is brand new, have you checked to assure there is a RO membrane installed?

Are you certain there is a flow restrictor installed?
Forum: Lighting, Filtration & Other Equipment 08/12/2006, 08:25 PM
Replies: 17
Views: 441
Posted By Unresistible Blue
There are some odd configurations out there in...

There are some odd configurations out there in the marketplace - including GAC after the DI.

Remember that extra stages doesn't necessarily equate to a better system.

Look into the quality of...
Forum: Lighting, Filtration & Other Equipment 08/12/2006, 08:21 AM
Replies: 17
Views: 441
Posted By Unresistible Blue
Buckeye does ship to Canada

Buckeye does ship to Canada
Forum: Lighting, Filtration & Other Equipment 08/06/2006, 05:38 AM
Replies: 17
Views: 644
Posted By Unresistible Blue
Yes - even if you keep the resin moist, and no...

Yes - even if you keep the resin moist, and no bio-growth occurs within the media, mixed bed resin has a shelf life. If you store it for over a year or so, you'll see a deterioration of the...
Forum: Central Ohio Reef Aquarists (CORA) 07/25/2006, 05:53 AM
Replies: 4
Views: 158
Posted By Unresistible Blue
Under factory spec conditions (77 degree F water,...

Under factory spec conditions (77 degree F water, 50 psi, and 250 ppm tds supply water), Filmtec membranes rated at 75 gpd or less have a rejection rate of 98%. 100 gpd membranes have a rejection...
Forum: Do It Yourself 07/25/2006, 05:37 AM
Replies: 90
Views: 4,514
Posted By Unresistible Blue
Remember that EACH membrane should see about 4...

Remember that EACH membrane should see about 4 parts waste to 1 part permeate in a multi membrane system to maximize the life of the membrane.
Forum: Lighting, Filtration & Other Equipment 07/23/2006, 09:14 AM
Replies: 3
Views: 349
Posted By Unresistible Blue
USe the color change feature as a rough indicator...

USe the color change feature as a rough indicator only. Trust your TDS meter. Most people swap out the old resin for new when tds climbs above about 5 ppm.
Forum: Lighting, Filtration & Other Equipment 07/22/2006, 05:09 PM
Replies: 3
Views: 159
Posted By Unresistible Blue
The lid on your RO housing (what you called a...

The lid on your RO housing (what you called a "canister") should be labeled "in" and "out" if viewed from the top. Assuming you can't see those labels, The water should flow into the housing, and...
Forum: Lighting, Filtration & Other Equipment 07/17/2006, 07:54 PM
Replies: 10
Views: 523
Posted By Unresistible Blue
May have something to do with the location from...

May have something to do with the location from which you are taking samples, or the container you're using to take samples.
Forum: Lighting, Filtration & Other Equipment 07/17/2006, 05:30 PM
Replies: 10
Views: 523
Posted By Unresistible Blue
Hmm - something is wrong. Your prefilters don't...

Hmm - something is wrong. Your prefilters don't affect tds levels substantially. So your post prefilter number should = your tap numbers.

If your post RO tds really is 2, then you are seeing a...
Forum: Lighting, Filtration & Other Equipment 07/17/2006, 05:25 PM
Replies: 19
Views: 702
Posted By Unresistible Blue
Try this - when you change them out, install just...

Try this - when you change them out, install just one first and check the water pressure reaching the membrane. Then install the second one and check the pressure reaching the membrane. That ought...
Forum: Monterey County Area Reefers Society 07/17/2006, 05:22 PM
Replies: 4
Views: 418
Posted By Unresistible Blue
So you're getting about a 95% rejection rate out...

So you're getting about a 95% rejection rate out of your membrane - thats pretty good.

The difference between 0 and 1 ppm (post DI) is really meaningless - you are likely at the limits of the...
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