New to RO/DI water use

[mark]

Originally Posted by rocco134

I am also new to RO/DI use. I just got my unit today. I have a quick question. Sorry to leach of your leach of your post salty.

Is the efficiency of the unit (waste: product) temperature sensitive (i.e higher water temp = less waste)? my unit is rated at 50gpd but i know that is based on ideal conditions (60psi and 77'F).

couple of links (here and here) that show the roll off in output with cold water and reduced pressure below the ratings as well as something on rejection rates.

[rocco134]

awesome! thanks Mark!!

there was mention of adding a piggyback membrane to improve your gpd. for future reference, do you know where i can pick one up?

also, if i were to change the membrane size to a 150gpd (i noticed from the links that were provided that some 150gpd membranes have a very good rejection rate) would i have to do anything special to the unit itself?

[Myka]

Originally Posted by rocco134

also, if i were to change the membrane size to a 150gpd (i noticed from the links that were provided that some 150gpd membranes have a very good rejection rate) would i have to do anything special to the unit itself?

I have the exact same AquaFX Barracuda as you do. I bought a Flush Kit for my system too. I flush it for about 5 minutes after every use. It's a great little system. Mine is also 50 GPD. I found it great when I had a smaller tank, but for my 90 gallon I am looking at upgrading. After 2 years (or has it been 3?) my 50 GPD RO membrane is finally starting to get used up, so I will replace it with a 150 GPD membrane. Upgrading is simple, buy the 150 GPD membrane with the 98% rejection rate, and buy a 150 GPD flow restrictor. You will find the flow restrictor on the good water line. If you pull the line off it will be stuffed in the end of the tubing. So, just make sure the rating of the flow restrictor and the membrane match and you're good to go!

[rocco134]

thanks myka!!

i am wondering if i should do the upgrade now. i have a 120 gallon tank.

where do you get your replacement cartridges?

[Myka]

In the past I have bought from Bulk Reef Supply, but I am going to order my next set from Kelly at The Reef Shoppe as his prices are very competitive.