We just bought a 400w MH conversion bulb today and the 400w HPS ballast, and shade to go with it, we have a 4' hydro harvest garden, and 15-30-15, as well as 20-20-20 ferts, also the nutrient solutions that came with the hydro harvest, some ph tests kits, and the air pump for the water.

How often do i need to change the water in the resevoir, and how close should i keep the bulb to the plants? Do i leave the air pump on 24/0?

Also, should i put a fan blowing over the plants? and lastly, does lining the walls with aluminum foil help much? We have 8 plants just sprouting in the garden now.
potandheavymetal Reviewed by potandheavymetal on . How is my set up?? We just bought a 400w MH conversion bulb today and the 400w HPS ballast, and shade to go with it, we have a 4' hydro harvest garden, and 15-30-15, as well as 20-20-20 ferts, also the nutrient solutions that came with the hydro harvest, some ph tests kits, and the air pump for the water. How often do i need to change the water in the resevoir, and how close should i keep the bulb to the plants? Do i leave the air pump on 24/0? Also, should i put a fan blowing over the plants? and lastly, Rating: 5