Mag for hair algae

[turtle]

I have a few small spots of hair algae on a few rocks that keeps coming back. I want to try raising my magnesium level to get rid of it.
Problem is that my Salifert mag kit only reads to 1500 ppm and I think I need to get to at least 1600 ppm.

What does the mag need to be to kill off the hair algae.?
I have sps, lps, and some soft corals, what is a safe level for them?

I skipped Chemestry in school, but it seems like each 0.02 of the Mg3 reagent added equals 30 ppm.
So I can add additional MG3, using a second syring full, to read the total ppm right?

Please let me know if you have done this successfully, as I don't want to kill of anything to get rid of a little hair algae.

Thanks

[Manoj's Reef]

I dont think increasing mag kills hair algae.
The increase in mag is for byropsis.
Tech M magnesium is used for this and its not the magnesium that kills it but an other chemical in the solution kills it.
I think from the salifert test kit readings you can extrapolate the value of mag higher than 1500
Maintaining it at 1700 ppm helps getting rid of the byropsis

[Sir Patrick]

^ Agreed!