RODI resin

[PowderTang]

Hi may I know when to change the resin or how long usage then we should change ?

After using for one month, now it becomes like 40 pop when I tested the water instead of the usual less than 5 ppm.

What is happening ?

Thanks

[PowderTang]

Ppm, not pop sorry typo

[Angel Keeper]

My understanding is 6 months... But I'm pretty sure it's based on litres and not months...

Sorry can't help you on this... Not an expert on this issue...

Angel Keeper

[asg]

Try test NO3 of the treated water. If it is high it is time to get a new resin.

[PowderTang]

Thanks Is 40ppm really that bad ?

[PowderTang]

I just bought the set about one month ago for my 3 ft tank...how come so fast become like that ? Do I have to change all the resin ?

[asg]

The key question to ask is how many WC has you performed with this set and what is the input water TDS. if it is less than 1000 litre usuage... no point sticking to this brand, waste your money...

[Evolutionz]

If youre usually getting less den 5ppm and now 40,your resin needs to be changed. Did you used di water to set up your 3ft?msyne thats why it only lasted a month. Not only does resin depends on your wc regime, it also depends on the tds of your tap water. The higher it is, the faster the resin exhausts.

[sherman]

More then 10 ppm need to change resin

[PowderTang]

Normal tap water about 80+ ppm I using crystal pro 3 stage set I think I did perhaps 200-300+ litres on the DI water So when I tested it yesterday, the reading gave me 40+ ppm. I set up using seawater. So how ah ?

[Evolutionz]

Resin exhausted.. Have to change for sure.

[Whiskie]

Am using 5 stage. So far only changed the pre filter once. Still maintaining at 0 ppm. Its been 9 months. Ro/di usage high as its also used for drinking water. The ppm at my area is high. Approximately 134ppm from the tap.

[Sani Boyan]

If not mistaken, this unit can produce 250-350l of DI water at 0ppm.

[PowderTang]

Wad ? After 250-300l and that's it ? It's about a month usage lei Is that normal ? Or which brand of resin is highly recommended ?

[resser]

Normal tap water about 80+ ppm I using crystal pro 3 stage set I think I did perhaps 200-300+ litres on the DI water So when I tested it yesterday, the reading gave me 40+ ppm. I set up using seawater. So how ah ?

Bro,

I am assuming you are only running DI resins without the RO + carbon + filter part?

I used to do that for my nano, the flow through resin should be very very slow. You should be seeing fast drops of water out of the resin, not a flow/ stream. Worse than postrate problems.

I used to change at 2ppm of TDS. They exhaust very quickly, about 150 liters worth of clean water if I remember correctly. Really not worth the money replacing them this way.

[PowderTang]

Oh dear Ok maybe I use them in a wrong way So what's a more economical method of using and which brand should I go for ? Do I need to change the carbon as we'll ?

[Evolutionz]

I run my water through a crystal 3 stage too. 1 carbon and 2 resin. I use about 60l water a month ans they last about 5 months for me. Thats 300+L of water. My tap water tds is 60+. And for me i dont really bother about flow, so long as it comes out 0 im fine with it. I can make 15L in maybe 20-30mins.

[Evolutionz]

And if your using 300l of water a month. Suggest you go for RODI instead. More economical

[PowderTang]

Wad will be the roughly consumption rate ? RODI resin can last how many litres ?

[bellinayu]

It's definitely more economical using RO/DI especially for larger volume tanks. Else you'll need to spend more in changing DI media. The RO is meant for sediment, carbon and RO stages are meant to strip yr water from most of yr impurities and the last stage which is your DI just "polishes" off. With this set-up, you do not need to change yr DI media so often. Without the RO filter, yr DI is the work horse.

[PowderTang]

I see Any RODI set to recommend ?

[PowderTang]

And since I already have the crystal pro stage 3 set which is just a DI unit, can I jut add a RO unit to it? Or do I still need to buy a RODI set which render my current DI set unusable ?

[ahchris]

I just started using RODI for my new tank. My first 500 litres was at 0 ppm. Next 500 litres at 3 ppm.

[Whiskie]

Additional filters can be added to increase the stage. But take note on the pressure drop. Especially if the unit does not have a booster pump.

[patricklhc]

Where sell the cheapest?

Madpetz one is of good quality. I'm using. If I'm not wrong they are having promotion now. Check them them