Issue with calcium powder

[Mr.Fishtank]

Just mixed up 1kg for 1.8 lts of rodi water and the mix is a tan color. It has been sitting for a few hrs now and is still tan. Is this an issue? I had similar issues with the AF calcium leaving a brown/tan residue only at the bottom of the dosing container after mixing. Some folks said they had the same issue with AF but used it anyway without issues. I didn't feel comfortable using it so I stopped. Anyone else have this happen and if so what did you do? Use it or not?

Hopefully Redsea would chime in and let us know what is going on with the calcium.

 

[Mr.Fishtank]

Mag crystals also will not dissolve. Placed the jug in hot water for a few hrs with no difference. When to the extreme and diluted it 100% in boiling rodi water and mixed the crap out of it. Let it sit for a couple hrs but still will not fully dissolve. What am I doing wrong?

 

[emvanburen]

I have same issues and am using both mixes. They are as dissolved as they will be. I'm testing weekly anyway.

 

[nrupaw]

Mag crystals also will not dissolve. Placed the jug in hot water for a few hrs with no difference. When to the extreme and diluted it 100% in boiling rodi water and mixed the crap out of it. Let it sit for a couple hrs but still will not fully dissolve. What am I doing wrong?

You're not doing anything wrong. Issue with Red Sea's dry supplements is that both Cal and Mag, after mixing, end up with additives (Cal has tan additives, and mag has white colored) settling at the bottom. Now the struggle is that you'd have to shake up th jug before measuring out a daily dose and manually dosing it. it seems that these supplements aren't made like the BRS ones which you can mix and hook up to an auto dosing pump