Instant Ocean causing KH spike??

[PoonTang]

what test kit are you using? is this a new bucket of salt? if not then i would suspect that it is ok.

[mark]

check this calculator, doesn't look like your alk is off compared to NSW

[Myka]

140 mg/l = 140 ppm = 7.84 dKH = 2.8 meq/l

This reading is not out of the normal range. I actually prefer my alk to be significantly higher at 9-10 dKH (160-178 ppm). Alkalinity is definately not your culprit. In my experience IO has varied very little from one bucket to another...sticking right around 11 dKH. I have had the alkalinity go up to 17 or 18 dKH in my tank, and the corals were just starting to show stress, but I didn't lose any.

If I were you I would be carefully doing a 50-75% water change as soon as I found out about the crash, and then proceed to do daily water changes of 30-50% until everything straightened out. Carefully, as in being sure to match temp and salinity very closely, and watching the critters for increased irritation.

[alfredshouse]

You guys are great, thank you for your help. I think my brains fried from all the stress. Im so glad the KH is okay.

[Myka]

What are your other readings the last time you took them before the crash? How long before the crash did you take them? What are they now?

Include as much as you can... temp, pH, salinity, ammonia, nitrite, nitrate, calcium, alkalinity, magnesium, phosphate...

What did you do to the tank in the 24 hours preceding the crash? Include everything, something as simple as stirring up the sand could be the cause.

[Jack]

Ya Myka makes some good points.

Your alkalinity is fine.

If its the Hagen KH test kit they reccomend a lower ppm, around 125 or so and it freaks people out when its higher than that.