Intrigued by bro haroldfock posts, I read up quite a lot before attempting the following experiments. If you try the same it is at your own perils.
1. Coral vitamins have almost the same elements as human multivits. Except the latter has copper but so does NSW.
2. Human amino acid can be used for fishes n corals.
3. Human vit C can be used too.
4. Epsom salt for Magnesium supplement. Increase aeration because of sulphate.
Why bother? Due to inquisitive mind and lots of expired supplements. Its been 4 weeks so far so good even managed to revive some corals.
Remember this is an anecdotal experience nothing scientific. Must say engineering knowledge on water does help.
Always start with small dosages. To borrow what bro haroldfock said - no heroics.
Thanks for reading. Remember try at your own rìsks.