padgett152
New member
I have a 2 stage RO unit under my cabinet. I have started using it and it totally eliminated my algae troubles. Is there any reason to have a 4 stage with DI unit? Please give me your thoughts
RO unit?
- Thread starter padgett152
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padgett152
New member
yes it is like the bare bones one kent sells. it is more of a home, under the sink system. still, the algae(green) problem is gone. do i still need the 4 stage with the DI ?
Aquarist007
New member
that's what I started out with Michael--never got rid of it if you want it
Aquarist007
New member
"Osmosis, according to the dictionary, is movement of a solvent through a semi-permeable membrane into a solution of higher solute concentration that tends to equalize the concentrations of solute on the two sides of the membrane. The normal flow of solvent is from the dilute solution to the concentrated solution.
This osmosis process can be understood by the following:
First separate a container into two equal sections by a semi-permeable membrane. On one side pour some distilled water and on the other side with equal volume of salt water. Leave it like that and over time, the level of the distilled water will decrease while the level of salt water will increase. So this process is called osmosis.
So it is very easy to understand Reverse Osmosis (RO) is the reverse of the above process. In order to achieve this, we need to apply pressure on the salt water side to force the water pass through the membrane. In actual application, we substitute the salt water with tap water. Most of the impurities from the tap water will be blocked by the membrane leaving a desirable purified water at the other end of the membrane. In the process a lot of water (80~90%) is wasted to drain which actually helps keep the membrane clean by flushing water over the incoming side of the membrane to remove particulates and dirt.
But reefers as us are still not satisfied with the result as the membrane can only reject 95~98% of ionic and organic impurities. The produced "clean" water still contains a little phosphate, silica, nitrate, etc. So another canister with de-ionizer (DI) resin is added at the final stage of the unit to further purify the water. The resin cartridge contains positive and negative charged polymers that interact with the contaminant to remove them. Thus 99% of pure water can be achieved."
www.apoon.com/ro-di.
PRDubois
New member
This is what I have and it works great!!
http://www.thefilterguys.biz/
$ 199.00 - OCEAN REEF + 1 FIVE STAGE 75 GPD RO/DI
All systems are made to order with clear 10" canister housings
Stage One NSF rated 5 micron poly sediment filter
Stage Two 5 Micron Matrikx NSF rated CTO/2 Workhorse carbon block
Stage Three 0.6 Micron Matrikx NSF rated chlorine guzzler carbon block
RO membrane 75 GPD Dow Filmtec
Stage Five refillable cartridge with color-changing DI resin
100 PSI pressure gauge
Auto shut-off (Requires Float Valve or Switch To Work)
Membrane flush valve
Dual TDS meter
Quick connect fittings
Self Piercing Saddle Valve Water Supply Connection
Drain Connection
Filter wrench to make cartridge replacement easy
http://www.thefilterguys.biz/
$ 199.00 - OCEAN REEF + 1 FIVE STAGE 75 GPD RO/DI
All systems are made to order with clear 10" canister housings
Stage One NSF rated 5 micron poly sediment filter
Stage Two 5 Micron Matrikx NSF rated CTO/2 Workhorse carbon block
Stage Three 0.6 Micron Matrikx NSF rated chlorine guzzler carbon block
RO membrane 75 GPD Dow Filmtec
Stage Five refillable cartridge with color-changing DI resin
100 PSI pressure gauge
Auto shut-off (Requires Float Valve or Switch To Work)
Membrane flush valve
Dual TDS meter
Quick connect fittings
Self Piercing Saddle Valve Water Supply Connection
Drain Connection
Filter wrench to make cartridge replacement easy
padgett152
New member
Thanks everyone. Really good info. You made up my mind for me. I am going to purchase one.
Mike31154
New member
So if your algae problems disappeared with your current unit, why would you consider additional filtration for your water? Some areas have very low TDS source water to begin with. Are you able to get information from your municipality or tap water supplier as to what the parameters are?
padgett152
New member
Though my algae problems are gone, there may still be some other impurities in the water I am topping off with. As far as getting parameters from my water provider.....Fat chance as I live in rural Southern Ohio. I am just lucky to have county water, LOL. I may want to add some softies so I think the RO/DI unit will be my next investment.
Aquarist007
New member
a pocket TDS meter is a good investment at 25 dollars
although you might be able to write off a new ro/di unit through your church and use it for baptismals
You don't want to be introducing heavy metals to infants at such an early age
padgett152
New member
Never thought of that... "Who would like to be baptized in 99.9% RO/DI water.?" I coulld even convince the congregation since we lose so much water during baptisms, we need an auto top-off system too. And wouldn't it feel so much more spiritual under the aura of T5 lighting...LOL... Thanks for the comments
Aquarist007
New member
IMO every church should have a marine tank too---I was able to convince my principals of that but never my minister
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