Help with 2 part dosing

[Mono]

I've started dosing two part again using Dr. Foster & Smith Sodium Carbonate and Calcium Chloride w/Magnesium Sulfate and Magnesium Chloride to boost Mg.

Using Reef Crystals with salinity at 35 ppt.

Mg was somehow low so I boosted it with 0.5 liter MgSO4+MgCl2 solution to 1400 in a 135 gallon system.

I dose the Sodium Carbonate first into my filter sock (high flow) and it precipitates out immediately forming large white flocks.

Not sure how to fix this? Any advice?

 

[Randy Holmes-Farley Verified Community Expert]

It is normal to precipitate magnesium hydroxide when the high pH solution hits the water. So it may be normal. That material redissolves as it mixes in.

But if you are forming calcium carbonate, it won't redissolve.

Dose to the highest turbulence area you have that is away from corals, dilute it if you need to, and add it more slowly if precipitation is an issue.

 

[Mono]

Thanks randy. Wasn't sure it was normal. Don t think its calcium carbonate. It flocks out like snow but does seem to re-disolve.

 

[Randy Holmes-Farley Verified Community Expert]

I show some pictures of precipitates, normal and otherwise, here:

What is that Precipitate in My Reef Aquarium? by Randy Holmes-Farley - Reefkeeping.com
http://reefkeeping.com/issues/2005-07/rhf/index.htm