Newbie-tomato struggles

[sadler850]

Hi All!

I am a new Hydro grower...started about 6 months ago. I am currently attempting to grow Brandy-wine tomatoes and sweet bell peppers in a DWC (5 gal buckets).

my problem is the tomatoes are growing like weeds, seem to grow buds OK, about half of the buds drop, and only a few have developed tiny tomatoes, but that is all it will do. The peppers wont bud at all.

I have been pollinating with an electric toothbrush.

any help is appreciated!! My setup and pictures are attached

SETUP:

(2) 5 gal buckets in small agromax grow tent
nutrients changed every 10-14 days
1 T5 HO light with 1 grow bulb and 1 bloom bulb
light on 12 hrs per day
heater to keep temp around 75 during light on, 60-65 at "night"
small fan inside to circulate air
C02 bag on light above plants
water is through PUR water filter