I read a thread about mixing Epsom salt and Plantex together in equal amounts. I now use ( Rex's guide ) 1 tablespoon of plantex into 250ml. of water. To add 1 tablespoon of salt to this mix seems like a lot. Is that right ? If my tap water contains enough already will the extra Mg. cause more problems for me ? My 150g is still looking sick, I made all the recomended changes from the other threads.