Why are you using reptile heat lamps?

They are a waste of electricity for MJ plants.

The UV-B rays are good during flowering when used in a 1:2 ratio with HPS but why the heat during veg? You would be better off with an MH in veg.

You would be better off serving your plants another Floro tube.

Also, you dont mention your pH for water. Rain water is not as clean as it was even 20 years ago and I wouldnt feed it to any indoor plants without filtering it first.

Many many polllutants in rain water now adays.