need help

[lonner1]

just set up my saltwater mixing station, with a rodi unit checked my alk in saltwater was 15.+. checked alk in di water it was 15.+. what can i do to lower it:tongue:

 

[caldone]

Try another test kit
Whats ur tds meter reading?
I suspect a problem with either your test kit or ur rodi unit

 

[lonner1]

thanks for the info, don't have a tds meter but have one on order. think maybe it's my refurbished rodi cause the pressure gaUGE DON'T WORK.

 

[Reefing Madness]

If its still in the mixing station, you can use Muriatic Acid to bring the Alk down.

 

[lonner1]

its still in mixing barrals 1 for salt 1 for dhk, each barral is 55 gal. how much should i mix in each 1

 

[Reefing Madness]

Adding 1/11,000 of the water volume as this acid will drop alkalinity by 1 meq/l (2.8 dKH).

You want a drop of 13-7 = 6 dKH, or 2.1 times that amount, so you'd add 1/5,100th of the water volume.

13 gallons ~ 49 L

1/5100 of 49 L = 9.6 mL

So I'd add 5 ml and stir well for a few minutes and see what alkalinity you get. Then dose again assuming it seems on the right track.

You'll need to aerate well after adding the acid to blow off the excess CO2 and bring up the pH.

Randal Holmes Farley

 

[lonner1]

would you care to put that in plane english, i have 55 gal of water in each drum