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Viewed: 313 -- Replies: 12 | ||||||||
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| Posted | Nitrate in RO ?? |
| 03-06-2006 10:01 by billysfc |
My RO water is testing at 10ppm for nitrate, I'm obviously off to a loser straight away.
What is a normal reading for nitrate in RO ?? |
| 03-06-2006 10:28 by Lee Smith |
hi mate mine reads zero, with tds about 5 ppm ph 5.5
maybe the membrane is damaged and leaking slightly whats your tds measure? |
| 03-06-2006 10:40 by Ray |
Hello,try using a different test kit,they are not always accurate. |
| 03-06-2006 18:47 by trik |
as lee smith said but your tds should be 0 to . how many stages is your ro and wat presure is it running at. richard . |
| 04-06-2006 10:33 by billysfc |
Have no idea what pressure, it has three stages, particulate removal, carbon, and membrane.
I think first I'll try a different test kit. How do you test for TDS. I take it this is total dissolved solids. |
| 04-06-2006 10:35 by billysfc |
I have this one
http://www.stm-shop.co.uk/acatalog/Online_Catalogue_RO_Units_11.html |
| 04-06-2006 20:34 by trik |
hi billysfc have a look at this guys site . RO MAN.
http://www.ro-man.com This guy will sort u out and cheap. |
| 04-06-2006 20:35 by trik |
hi billysfc have a look at this guys site . RO MAN.
http://www.ro-man.com This guy will sort u out and cheap. |
| 04-06-2006 21:36 by sprayer1 |
hi,get yourself a 6 stage RO-MAN,a spare 1 liter DI resin,and you'll never look back. |
| 05-06-2006 13:01 by Lexter |
two different fish stores have told me that you always get small nitrate even in RO water, perhaps 10-20ppm, i take it from yur post then that 0.00 is expected from RO??? |
| 05-06-2006 21:59 by sprayer1 |
An RO uint combind with a DI unit,is the best you can get,if kept in check,TDS will always be zero.some nirate kits can give false readings on RO water ?.I've never had any reading out of my RO-MAN. |
| 06-06-2006 11:33 by Alan |
An Ro unit alone will not remove all nitrate hence the best units for marine consisting of multiple stages the last being a DI resin to remove any remaining impurities thats why I went for a 6 stage RO unit.
Incidentally if you are on a live rock based system or ecosystem method a 10 ppm reading for nitrate will not be detrimental as the system will consume it very quickly. Also as sprayer1 says testing RO water is not easy as false readings are common with RO water. |
| 06-06-2006 19:58 by billysfc |
Well I've ordered a TDS meter, that should be interesting.
What a great shop though, cheapest RO units I've seen, plus all the different fittings to go with them. |
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