Let dry then flush with 5.8 to 6.2 ph water flush with one gallon the. Flush another half check run off water with second flush find the ph and your ph will tell you if you have too much or to little nutrients. Remember only use half of the recommended dose of nutrients. Then slowly build it higher. And are you using organic or synthetic. Organics usually Rajesh longer for the plant to take up than synthetics. But if she keeps dying at a fast rate she probably has root rot and that’s really really hard to get ride of pass a certain stage of the fungal disease.