RODI micron question

[StirCrazy]

Originally Posted by Myka

In my system, pH is 7.5 to 7.8 after the carbon block and I use 72-75F water.

PH might be a bit high but let me know what your getting, another problem brought up by Randy is the test kits we use are basically junk for lower concentrations and quite often give bad readings, but who wants to spend the money for a good one......

on another note, why is your tap water so hot?

Originally Posted by Myka

Also of note, NH4 generally isn't toxic to fish, but NH3 is lethal.

ya NH4 has to be pretty high to be harmful, but I think in the big picture, if are talking "top off water" then a little NH3 would be diluted so much then metabolized by the bacteria rather quickly. water changes might be different but if you have high ammonia you can always treat for it just before you mix your salt.

but this has gone way off the rails of ReefOcean's original question about if the Aqua Pure units are good, there all the same, only difference is amount of stages, type of membrain, and the filters. Do you have a link to a picture of the one your using. Also you need to know a bit about your water, in victoria we had a huge algae content in our water, this sucks as it plugs filters real fast, same if you have high sediment content.

now from what I remember (26 years ago), edmenton had medium hardness water. ok so I just looked, the average TDS seams to run between 138 and 170ppm this time of year and they adjust PH to 7.8

if your talking this aquapure company http://www.aquapure.com/aq-products/...ro5500-lf.html

run away and don't look back, propriatary filters that are expensive.

this is the look the system should have http://www.costco.ca//.product.10344...ontent=Default

I prefer the clear housings myself. most systems like this one (5 stage ro) are comming with a 5micron prefilter, followed by 2 carbon block filters (thats the 3 on the bottom) then the ro AND A gac post filtration. if you are using it for your tank only then you don't need the tank or GAC stage but the GAC won't hurt anything. mine was basicly this but it had two RO membrans for 320 gal per day and a resin filter instead of the GAC. what I did was add a stage at the beginning which was my 25 to 1 graduated filter, put a 1 micron in the chamber that had the 5 in it and then the two carbon blocks.

any questions feel free to ask, sorry for side tracking this thread off topic so bad haha.

Steve