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This last grow I had a slight problem with mold. I think one of the (several) contributing factors was due to inadequate exhaust/filtration. My grow room is about 9ftx5ft with about 9ft ceilings. I have a 8" vortex fan exhausting air that is approx. 750cfm or so if i remember correctly. I...

I just started the 7th week of flower and I noticed a couple problem plants. The bottom of the plant and inside middle look great, nice and green, and smells sweet. the top of the plant does not smell pleasant at all. The bigger fan leaves are yellowing (not crispy ) and are all pointing down in...

My girls are in veg, and most are getting close to 8"-10" tall. Im about to transplant into 3 gal soil buckets. Right now they are in pretty small containers. I have hardly given nutes at all (foxfarm ocean soil) , until a very light feeding this last watering. new growth seems almost neon grren...

Right now I have 24 girls under (1) 400w ceramic metal halide. They are taking up a space of about 2x2 currently. At what point do you think I will need more light, or do I already need more? This light has a broad spectrum, but i am worried about the lumens, as it only puts out about 40,000...

I built my room in the garage using 2x4's and drywall. Unfortunately, neither the ceiling, or the floor was level, and after i put up the drywall there were a few spots with light still seeping through. I caulked the top and bottom of the room where the light comes through, but the caulking is...

This is a ceramic metal halide that connects to a hps ballast http://www.hydro-techn.com/seattlehydroponics/ceramic.html This bulb was recommended to me by my local hydro shop for veg. Last run I used a 1kw HPS hortilux eye for veg because i did not have $ for a separate veg setup. Everything...

I need to replace my Hortilux eye 1000w hps. I do not have a separate lamp for veg, my last grow i just used the hps for veg and flower. I was wondering how these dual spectrum bulbs are, and if anyone has used them? They combine both enhanced M.H. and Super H.P.S. to achieve strong peaks for...

I noticed that the filter (sleeve) that goes around the outside of the carbon scrubber was very dirty. Are these replaceable, and if so, how often should I buy a new pre filter for it? Also, is it a problem to just leave off? Thanks

I have (1) 6" Vortex powerfan vtx600, this is a 449CFM fan. I also have (1) 6" Hydrofarm with a 400cfm rating. Here are a couple quick questions- 1. Is the 6" Vortex big enough to exhaust a room that is 9.5' x 5.5' x 9.5'? 2. Should the bigger fan go on the intake, or the exhaust side? 3. Do...

We are finishing up our new grow room and we are just about ready to put some girls in there. We live in a med state so we have many vendors around that have teens available (around 1-1 1/2ft tall from clone) for a donation. Can somebody give me some pointers at what i should be looking for...

I have 2 fans and want to know what the best way is to set up the exhaust. Should I do: A. Charcoal filter> exhaust fan>air-cooled hood>exhaust fan>ducting out of room B. Charcoal filter>exhaust fan>air-cooled hood>ducting out of room (then use the second fan I have to just suck out air by...

Im trying to figure out what size filter i need. My room dimensions are as follows- 9.5'L x 5.5'W x 9.5'H. Id rather be safe than sorry, so a little too big would be better than not big enough. im using (2) 1kw lights if that matters at all. Everything is rated in cfm, but i dont know what cfm i...

Hi everyone! I'm starting a new grow, and would like to use T5's this time (instead of the hps i used last time). I've been reading and looking online, but Im getting a little confused as to what spectrum and how many bulbs I need. If someone could help suggest some lighting I would really...

Hi everyone at MP! Ive been gone awhile, but am now back with a new place for my med grow. Our laws in Cali vary from county to county, as far as how many plants you can legally grow. I just moved to a place where I can only have 6 mature (per card holder), and of course I will need these to be...

Hi everyone. Ive always had this same problem when growing, and we are having a hard time figuring this problem out. We are using black gold soil and we added a little dolomite lime. We are starting week 3 of flower today. The problem is at the tips of the old growth- the tip starts to...

Its my first harvest, and not knowing how long it would take to trim I didnt leave myself enough time to get to all my girls. So what I did was chop them all, and hang the ones I didnt get to finish upside down in a dark room, 65 degrees, 35% humidity. I just tried trimming one today and it was...

I just finished my 8th week and am about to harvest tommorow. Walking up to my apartment you can occasionally get a good wiff of bud through the air, and this obviously makes me nervous. I use a can filter attatched to a hydrofarm 6" fan and i run duct through my air cooled hood and up into the...

We are getting ready to veg and have been considering trying a new light, but want to know if it will be worth it. This last time we vegged with a 1000w hps, 18/6 for 2 weeks from clone. In that span of 2 weeks, id say they grew about 8" or so. I know HIDs are not best for veg, but because of...

Im sorry, but I could not find this thread, and I know i saw someone started a smilar one. Im almost starting the 6th week of flower, and have about 3 different strains growing. How can I tell when Im 2 weeks out? thanks.

I was told in another thread that this was most likely a ph problem. My question is, what is the best way to test the PH of the soil? I have a probe with 2 legs that measures light, water, or PH (you select what you measure by sliding a dial over). Ive read they need to be calibrated, but I have...