Please help with my plants, they have gotten sick on me about 5 days ago.

The leaves are turning brown from the bottom up, 2 of my plants have lost the first and second set of leaves (from the bottom up). I did some research and thought I was low on P, so I gave them some epson salt and a little bone meal to bump the P. This is the only nuts I have given the plants for they are only 18 days old.

Here are some specifics:

Soil: 1/2 Scotts Potting Soil .08 .12.08 Nut Levels, 1/4 Perlite, 1/4 Sand
Age: 18 Days Old
Light: 400 Watt MH Light On 18/6 Cycle and about 18" above plant Tops
Light: 2 - 80 Watt Flour. Light Fixtures (2x40 4 Foot Long) 18/6 Also
Fans: 2 Fans One On Them, Other Oscolating to move are around
Nuts: No nuts until bone meal and epson salt to boost P

I gave them the bone meal and epson salt about 3 days ago and it has not helped yet. The leave stems are a little purple, not sure if it is the strain or nut problem. The pictures posted are 4 of the leaves and one of the soil I am using.

Any help is appricated, please only give help if you are familiar with this problem. Thanks

JRF
johnnyrocketfuel Reviewed by johnnyrocketfuel on . Bottom Leaves Sick, Please Help, Expert Advice Please Please help with my plants, they have gotten sick on me about 5 days ago. The leaves are turning brown from the bottom up, 2 of my plants have lost the first and second set of leaves (from the bottom up). I did some research and thought I was low on P, so I gave them some epson salt and a little bone meal to bump the P. This is the only nuts I have given the plants for they are only 18 days old. Here are some specifics: Soil: 1/2 Scotts Potting Soil .08 .12.08 Nut Levels, 1/4 Perlite, Rating: 5