Can fusarium wilt be treated

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I grow in smart pots and use a swimming pool for a resorvoir. i was having problems controlling the heat in my tent as this is a new house and my first grow in the new house.. i like to put 2 days water supply in the pool for the plants to wick up and several times the temp in the tent was 89 degrees which raised my nutrient solution past the safe temperature which may have caused this. Bottom branches are dying and look like overfertilization after first showing white blotches then leaves yellowing and curling to lay dead on the plant but not dropping. . i have treated with a hydrogen peroxide solution and have cut out nitrogen . they r 2 weeks past the transition week to bud.. if it cannot be treated what are my chances of beating it to harvest