RO/DI questions

[300ZX]

i have an aqua-safe ro/di unit that i've been using for about 1.5 years now, i have never replaced anything on it yet

 

what stuff should i replace on it? di resin? membrane?

 

http://www.buckeyefieldsupply.com/showprod...howspecials=149

is this tds meter any good for $18.95?

 

http://www.buckeyefieldsupply.com/showprod...=40&Sub=127

will the single refill be enough for my aqua-safe unit? or should i get the 5lbs

 

what else should i replace other than that?

 

thanks

[300ZX]

somebody?

[zippykat]

the di resin should be replaced every 3-6 months depending on your usage of the filter. I recommend the color changing di resin from bulkreefsupply.com...it is a great indicator when the resin should be replaced. all of the other filters except the membrane should be replaced every 6 months-1yr, again depending on your usage of the filter. If you keep these 'pre'filters changed out on the regular basis the 'membrane' filter part should last your 2-3yrs before it needs replacing.

 

the di resin is usually sold in single use packages...only buy what you are going to use in 1yrs time otherwise it starts to go bad

[Marteen]

+1

 

Also if you find the output of your RO/DI to have diminished try installing a flush valve or rinse off your membranes after each batch of water to increase flow and prolong the life of your membranes.