RODI System output

[PapitoDelSol]

Hi,

Sorry if it is in the wrong section!
Need to buy a RODI system for my tank (56g).

Tap water is 170 ppm. Better to go for a 4 or 5 step?
I have the choice of 105GD or 500GD.
Got a good deal for the 500GD but I’m afraid it will be too powerful. Except at the beginning when it will run 1h, other time it will be 5 or 10 minutes.

Thanks for your help

 

[TheNative192]

Hi,

Sorry if it is in the wrong section!
Need to buy a RODI system for my tank (56g).

Tap water is 170 ppm. Better to go for a 4 or 5 step?
I have the choice of 105GD or 500GD.
Got a good deal for the 500GD but I’m afraid it will be too powerful. Except at the beginning when it will run 1h, other time it will be 5 or 10 minutes.

Thanks for your help

Definitely get 5 stage. My water is 200 TDS and the 5 stage barely handles it well. Just not worth cheapening out with it because it’s hard to upgrade and you will be buying a lot more DI Resin in the long run. For the GPD my 75GPD makes around 4 gallons every hour. So if you do 500 GPD you can make 6.6x more or ~26 Gallons per hour. At 105 you are looking at ~5 Gallons per hour. I like to make my own water now and mix my own salt and I am using a lot more RODI since I got the system so I would recommend the higher one although the 5 Stage is a must!

 

[henry92]

I agree with the 5 stage, my water is terrible between 450-550 tds, I went slightly bigger than I needed and found i starting using RO water for so much more than just the fish tank, so I was so glad I went bigger.

 

[lapin]

At 170 ppm tds get the 5. 4 would work but…. You have no way of knowing how much sediment you have. The extra sediment filter will help out so you don’t have to change filters out too often. Plus sediment filters are cheap compared to carbon or r/o filters.
There is no difference in power between 100 or 500 gpd. Power comes from your water pressure. The difference is how fast it makes water. Just because it says 100 or what ever gpd you won’t get that.

 

[exnisstech]

I like running 5 stages with 2 di resin. I have TDS meter between the two di canisters. When the first canister is depleted I rotate the last canister up and replace the depleted one then fill the last one with fresh resin. This way I always have 0 TDS output even if I'm slow to change the first depleted canister.

 

[PapitoDelSol]

5 stage it is!
There is a booster pump incorporated for the pressure.

 

[lapin]

5 stage it is!
There is a booster pump incorporated for the pressure.

Kool