Ok...so after giving my
RO/
DI unit from Ebay some break in time and ordering a
TDS meter, I decided to run around the house with my
TDS meter to see what I came up with.
HTH My tap water is about 158 on the
TDS......after getting water from my PUR filter that is connected to the same tap it came out a SMOKING 156...yee ha! Good to see that the carbon was doing it's job...taste good though I must say. Anyway...waste water from my
RO/
DI......which goes throught everything but the
DI and polishing stage (cause fish care what water tastes like right?)...came out in the low 100 range. After
DI and polishing a SOLID 0...zero...nada...zilch...nothing. If I mixed waste water and the
RO/
DI I receieved a 90 TDs reading. I have come to several conclusions from this.
First...the Ebay
RO/
DI's are solid....at least so far. Will report back in 6 months to see where we all stand with our
TDS readings then.
Second....using waste water in
FO...
NO live rock no inverts...can't be that bad (obviously this will depend on your waste water quality). You must be open to cleaning up algae and the like though...cause this will occur.
Third...I am throwing out my PUR water filter attachment....only water I drink is usually mixed with barley and hops.....or blazing hot from the coffee pot.
Fourth...I am not taking my
TDS meter to my families house in West Virginia we we get water from a spring because the tap water is really hard....I don't want to know the readings....
HTH....would love to hear what other people are showing...
IMO....a
RO/
DI is necessary whenever running a reef tank or inverts....or both (as most have it). Unless you are getting water from water stations.
My 4.5 cents