B1 really should only be used when transplanting or cloning, that is my opinion and it seems to have worked for me. you really need to just get a decent balanced plant food, 10-15-10 or somthing close for veging then a 0-10-10 or 0-?-? for flowering dont get too high on the nutes and only use them about once a week. look to see what others are using or ask. as for your cooling issue, do you have fresh air going into your grow? if not you need an exaust and an input fan or a passive input, you could do this with some computer fans. you say your pots dry out fast? this is how i water. get a one gal container and a 3 gal bucket, fill your gal and adjust ph, you can lower it with a tsp of vinagar. mix your nutes like instructions say and pour it into the 3 gal bucket, this is done for correct mesurments. mix what you need. now take your pots "assuming they have drain holes" and dunk them in the water not submerging them, use a small container to pour water on top of soil holding them above the water. pour water on the soil till it starts to drip from the bottom. this will ensure complete watering of all the soil, set them in a drip tray for 10 mins and put them back in your grow room. I have great success using this method. remember to feel the weight of the pot while it's wet or weigh it, then when its ready to be watered again weigh it again, make notes of the weight and water when needed, if you have multuple pots when one is ready for water, most likely they all are. hope this helps.