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I used root tabs starting on friday. Snail Died Saturday Afternoon im guesing.
My Sword Tails Already HAD BABYS!!!!...
Good grief! This has phosphates which is best avoided as it causes issues with algae. Is that all there is? Iron is chelated so it is not a problem. I don't think your fert is the cause of the snail's death. Possibly just plain ol' age.
When i Dissolve salt i usually do it 24 hours in advance of a water change. I boil the Water and Pour it in. Stir it until its clear. And let it cool down to Room temperature. Then De chlorinate the water. Then add it with a water change. Though i have been adding a little more salt than usual because im breeding fish that like it a little bit salty.