salifert and elos are both great
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Anyone can answer this for me please??

yes 990 that is correct! time to dose! bring up very slowly!!!
-chris
Unless there's a possibility of having contaminants in your magnesium there's no reason to go "very slow". Tank inhabitants seem unphased even by jumps of several hundred PPM.
Fsu, if you want to be on the safe side bump it up to 1300+ over the course of a few days. Raising it that much will require a lot of magnesium supplement so don't think you're going to get a bottle of supplement from the LFS and be done with it. It would take you 4 of the big bottles of tech M to boost 100 gallons to proper levels. So, unless you have a very small tank you might want to look into home made supplements.
Salifert here and pleased with results![]()


