Magnesium

[Shtiff1]

Here I go again. I wanted to know if anyone else is using Magnesium like crazy? I have been adding 7 teaspoons of Brightwell Magnesium P, which is about 35 grams. I tried to do the day by day test to see what my loss was, it just drops to fast. I probably losing about 60 ppm a day. I'm reading the directions on the Container and it say to mix stock solution 4 tsp to 8oz of water, then divide your daily loss by 6 and then multiply by the volume which is 120 gallons. That gives me an estimated 200ml a day. Does this sound right? Calcium and Alk always stay perfect.

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[NanaReefer]

Very strange! I'd be checking the test kit your using. Especially since your Ca/Alk are fine.
What are your actual Mag readings? Are you getting a ton of new growth from your LPS/SPS or Coralline algae?

 

[Shtiff1]

I am using Red sea pro. Thought it was test kit also but I took the water to lfs and they came up with same readings. Yes corals are growing great. Lots of new growth and heads. Coral line coming in good to. Mag readings are 1260 now, 2 days ago it was 1300.

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[NanaReefer]

Those readings indicate that your only dropping 20ppm per day. Do you have a lot of stoney corals? 1260 isn't bad, a little low but nothing to be really worried about. Especially if your Ca/Alk readings are within acceptable limits.

 

[joeyhatch11]

I too have had the same issue. I have a 33L (40G total system with sump). Im using Red Sea Coral Pro salt as wel and my Mag. is always around the 1300 range. I've tried to dose more Mag and only raninto problems with Alk dropping and calcium getting out of wak. So I leave the Mag where it is and just worry about keeping my alk and calcium in check.

 

[Shtiff1]

Povona
Hollywood stunner
Digita
War coral
Candy cane - 2
Frogspawn
Hammer
Duncan
Leather
Acan
Blastos
Mushrooms
Palys
Zoos
Xania
Galaxia
Coco worm
Dendro
Pipe organ

Some fish and inverts

Sorry it was 1240 not 1260



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[NanaReefer]

Still 1240 isn't bad. With all those stoney's it's not unusual to see a drop like yours. You can dose Mag or not

 

[Shtiff1]

Ya just did another 30 grams. I'd rather keep it up than let it go. I'm going to try 50 ml a day and I'll see how that goes. I was just curious if others are doing the same. Thanks for your help.

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[joeyhatch11]

Just make sure your also dosing calcium and alk with that mag. Just dosing the mag will make alk drop. I ran into an alk swing when I was doing 30ml a day of mag to try and get it up around 1400.

 

[Shtiff1]

So far so good. Alk, 9.5. Cal, 430. 5ml of alk/day and 10 ml cal/day.

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[joeyhatch11]

Yeah I'm currently doing 15ml of calcium and 7ml of alk. Alk is a 9.6, calcium is finally going up, at a 420 now. I also add 10ml of mag too each morning that's currently around 1380.

 

[Shtiff1]

Yeah I'm currently doing 15ml of calcium and 7ml of alk. Alk is a 9.6, calcium is finally going up, at a 420 now. I also add 10ml of mag too each morning that's currently around 1380.

What size is your tank?

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[glb]

I just added 20ml Brightwell mg to my 12g nano and that will supposedly raise it 52ppm. I'll have to do that for 2-3 days to get it high enough. That is a lot!

 

[joeyhatch11]

I have a 33L with a 20L sump, roughly 40G. I also have 30+ corals. Not sure why my calcium has such a hard time staying above 400 when alk and mag are good. But thus far with the 15ml daily, I've seen a slow/steady raise in it. Once I get to a steady 440 I'm going to stop and start testing/recording to see what my drops look like over a week long period.

 

[Shtiff1]

I have a 33L with a 20L sump, roughly 40G. I also have 30+ corals. Not sure why my calcium has such a hard time staying above 400 when alk and mag are good. But thus far with the 15ml daily, I've seen a slow/steady raise in it. Once I get to a steady 440 I'm going to stop and start testing/recording to see what my drops look like over a week long period.

Ya some tanks use more of the other I guess yours is cal and mine is mag.
That's what I did, record every day and add accordingly.

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[glb]

Ya some tanks use more of the other I guess yours is cal and mine is mag.
That's what I did, record every day and add accordingly.

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That's what I'm doing right now. Testing every day for a week.