View Full Version : Low DKH

03/03/2011, 08:28 AM
Here are my param's:
nitrate: 0
nitrite: 0
Phos: 0
ammon: 0
Calcium: 380-420
ph: 8.2
temp: 79
DKH: 90ppm
Mag: Unknown

So I bought a carbonate hardness test kit yesterday finally and tested the water at only 90ppm. With my param's above, how do I get this number up to the acceptable range? I was told to check magnesium so I am trying to track down a kit for that. Could that be the culprit? Everything is the tank is very very healthy and exploding in growth.

03/03/2011, 08:50 AM
What all are you dosing and how much?

03/03/2011, 08:55 AM
I actually do not have a dosing routine right now. That is what I am currently researching on this forum actually...:wavehand:

I use a pro-buffer by Kent every week or so and only treat for 60 gallons. It keeps my PH right at 8.1-8.2. My calcium was steady at 420 for a long time until I just started SPS, and it dropped FAST. so now I struggle to keep it at 400.

Mr. Wiggles
03/03/2011, 09:11 AM
I would look into dosing sodium bicarbonate (NaHCO3) from your local grocery store, and CaCl2 and MgSO4/MgCl2 from Bulk Reef supply. I would follow Randy's recipe for making the solutions. It is relatively straightforward, just be sure you test your water regularly until you understand your specific tank needs. I only dose the above to my tank and have had good luck so far, I wouldn't bother dosing some pre-made buffer.

03/03/2011, 09:20 AM
Check. The recipe on BRS? I was just looking at that...

Mr. Wiggles
03/03/2011, 12:14 PM
Sure. I use this one:
I don't think it matters much as long as you pick something and stick with it. I would recommend setting up an automated dosing schedule, since it will be more stable and you won't have to worry when you go out of town or get busy at work. Best!

03/03/2011, 03:53 PM
Relying on buffers to alter ph is not a good strategy,imo, as alk is added and ph reacts to CO2 levels. Pick an approrioate alk level and keep it steady. If ph goes low use other strategies via air exchange or dripping limewater in lieu of some of the two part additives to raise it.

03/04/2011, 12:37 AM
Many tanks require daily alkalinity supplementation. I agree that a 2-part is an easy way to get started. The DIY recipes are fine, IME. I used B-Ionic for years, and it seemed to work well, too.

03/04/2011, 12:38 AM
Oops, meant to post this link:


03/04/2011, 12:51 AM
Mine has never been in the 5's --- even when I neglected my tanks my readings stayed close to 7. Baking Soda !

03/04/2011, 09:49 AM
So I retested and retested and got 7. I think i was mis reading the directions. But I ordered the 2-part dosing from BRS yesterday.

Mr. Wiggles
03/04/2011, 12:51 PM
Did you get CaCl2 and MgCl2 from BRS? I found that baking soda is pretty cheap from the big box store, and I got a good price on MgSO4 from Walgreens (like $1-2 for 1/2 gallon).

03/04/2011, 01:10 PM
Got the "Total Package Recipe 1 Small"