View Full Version : Dosing Q?

03/12/2012, 08:49 AM
29 gal nano,i dose by hand.my alk is usually at 8.3 andmy cal 430,i dose to get to alk 9.0 and cal 450 .my mag is usually around 1280.when i dose alk,then cal in that order i get precipitation.is there an order which to dose that will take care of this?should i make sure my mag is at 1350 before dosing?any help appreciated.

03/12/2012, 08:55 AM
You need to dose them at different times, at the least 20 minutes apart... In a high flow area....

What 2 part do you use?

03/12/2012, 09:03 AM
yes i would get the mag up to 1350-1450 range. then adjust ur cal and alk.

03/12/2012, 09:09 AM
using natu reef 2 part,at 75% of randy 2 part as recommendedby randy.looking for a good mag supplement.any suggestions?

03/12/2012, 09:16 AM
I would get the mag upto 1350 then set your alk and Ca levels....

Things should get squared away then.

Randy Holmes-Farley
03/12/2012, 10:57 AM
1280 ppm magnesium is fine and is the natural level in the ocean. Higher is also fine, but a small increase is not going to make a big difference in abiotic precipitation of calcium carbonate.

What are you observing that makes you think you have a precipitation problem?

What exactly are you dosing?

03/12/2012, 05:05 PM
Randy,I am dosing natureef alkalinity plus which says carbonate sulfate bicarbonate bromide hydroxide iodine and fluoride in decreasing letter size on the bottle,then hardness plus which shows calcium magnesium strontium potassium lithium barium and boron the same way.which I suspect is most to least.i am dosing approx 9 ml of each.after which I see a lot of cloudiness which dissipates within 12 hrs

Randy Holmes-Farley
03/12/2012, 06:04 PM
Does it really take 12 hours? Might it only take a few minutes to disperse? That is why I asked what you observed.

First, both solutions are clear before dosing, right?

It is normal for high pH alkalinity additives to show some local precipitation of magnesium hydroxide. That dissipates over a few minuites as it mixes in. In some cases, especially with lower flow, it may take longer, but not 12 hours.

This, for example, is normal:

What is that Precipitate in My Reef Aquarium?

from it:

Figure 3. The transient cloud of magnesium hydroxide that forms when high pH additives are added. In this case, the alkalinity portion of B-ionic was added to a fairly still portion of one of my reef aquaria.


03/12/2012, 09:01 PM
I see a small precipitate that dissolves quickly in the high flow when I add tha alkalinity dose.but afterwards I get a general cloudiness where I can see particles freely floating in the water,that is what stays for a longer period of time.its not so much cloudy as much as seeing sand like particles in the water as opposed to being crystal clear

Randy Holmes-Farley
03/13/2012, 05:42 AM
Are both additives clear to begin with?

It is not the normal for calcium carbonate precipitation to only happen in the water column.

03/13/2012, 05:51 AM
Yes they are clear,

Randy Holmes-Farley
03/13/2012, 07:42 AM
You might dose just one of them on a given day and see which one it is. More than likely it is the alk part and it is not a concern. Switching to a low pH alk part (like my DIY Recipe #2 or B-ionic Bicarbonate) should eliminate that issue.

03/13/2012, 07:48 AM
Thanks I'll give that a try,I was thinking of switching to your 2 part anyway.