1 or 2 DI's

[steveb87]

Setting up my water system and wondered if anyone has 2 DI pods after the RO? and why.

 

[seangee]

For tropicals there is not much point in DI. I have a carbon post filter, probably not needed but I also use it for drinking & coffee (and I have a box of them in the garage )

 

[steveb87]

For tropicals there is not much point in DI. I have a carbon post filter, probably not needed but I also use it for drinking & coffee (and I have a box of them in the garage )

It will be used for keeping and breeding soft water fish.

 

[StevenF]

RO filters will easily reduce hardness to less than one degree. There is no need to go lower. DI filters are not worth the expense

 

[TwoTankAmin]

I run a small system with 3 modules- carbon->RO-> DI. I is a 75 GPD membrane and the unit cost me about $125 delivered when I bought it. We got a second one about 8 years later and the price had gone up to about $135 + shipping.

I mix my pure water 11/9 with my tap which is soft and neutral. The tank is at 6.0 and TDS in t the 60 ppm range. It has been as low as 4.2 pH and TDS in the low 20s in the past.

I have also used the unit to batch water used in simulating the rainy season.