Can't Keep KH higher than 7

I get a small amount of precipitation when I add the alk, but it dissipates quickly. How do you make sure it's not "snow flaking"?
 
Used it before and still have some..... good stuff but gets expensive on larger tanks

When I dosed that I would do my calcium in the morning then my alk at night.

Its going to take some time to figure what your tank consumes in a day and it will change as your corals grow.

I have tried many different ways to dose and my favorite way to dose would be either two part or a calcium reactor.

I would just give it time and see if it will stabilize before you change.
 
Ok so I had a dKH of 7.5 earlier. I dosed my 180 of alk and ca waiting a half hour in between (Ca at 9:30 and Alk at 10:00) at 10:30 my alk tested at 11! This rocks.

Now the only thing I'm worried about is my top off water which I mixed Kalk into (it has yet to top off for the first time with the kalk). I'm wondering if I should toss that out? Of course, I would like to dose less that 180ml of the two part so maybe I'll keep it?
 
I just kind of keep my mouth shut a lot and listen to what you guys say and learn.

I have been hanging out in the reef chemistry forum :reading: for a while because thats the first thing a reefer should learn.

I think we argued before about the denitrator lowering alk and everyone said I was :hmm3:.

Best tool is the http://reef.diesyst.com/chemcalc/chem_calc3.html

Good luck every one... Just remember don't raise more than one dkh a day.
 
You jumped way to high way to fast!!!!!!!!!! Not good dont touch the tank for a couple days until it drops to about 8.5. Then dose slowly only 1 dkh a day. Until you get to your desired dkh then follow the directions on the bottle.
 
Dont worry if you are reading a kh of 11 an hour after dosing... From what I have been told it will spike up kind of like a bell curve. True readings will be 18-24 hours later. Dwayne can correct me if I am wrong.
 
Well there's no way I'm auto topping off a gallon of kalkwasser - I just tested 8oz dripped over a couple of minutes and my pH went from 8.3 to 8.4...

I need a dosing pump - actually a four pump doser.
 
2 things.....

Todd is correct if you dose your calcium to soon after adding alk you can get precipitate.
I always added my calc the day after I did alk.


The second thing is just as a reference for you guys having issues raising your alk. It took a heaping tablespoon full of baked baking soda to raise my alk 1 point on my old tank which was about 140 gallons total water volume. You guys with big tanks would need to be using 3-4 heaping tablespoons to raise yours up.
 
I just started using an aqua-lifter pump to does 1 1/2 gallons of Kalk everyday. Its help keep things stable. I also does 2 part daily.

The lifter pump is nice, and cheap at about 15.00. I set it up on my reef keeper to run 2 minutes every 2 hours. I would not trust it with just any timer.

All this talk about precipitation?? What is the real problem?

I have a little when I dose, but it goes away within minutes. Am I causing unseen problems?
 
Kh

Kh

Here is my water test summary:

NH 3-4 0.008
NO2 0.008
NO3 0.5
Phosphate 0.15
Silica 0.1
Potassium 303
Calcium 340
Boron 0.9
Molybdenum 0.2
Strontium 7.9
Magnesium 1125
Iodine 0.03
Copper 0.02
Alkalinity ( meg/L ) 2.82
 
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