I threw this question out in another thread not long ago but I wanted to get more input about it. I have a product called liquid co2 boost put out by aquarium pharmaceuticals. It's basically made for aquatic plants. I was hesitant to use it but tried it anyway. My plants shot up literally overnight after adding this product. Has anyone ever used anything like this? I'm really new, this is my first grow, I'm running a 400 mh and a 400 hps in a 4x4 tent. I keep the 10 gallon res aerated at all times, ph 5.8, temps are around 80. I just set up an exhaust fan yesterday. I planted my sprouted seeds about 5 weeks ago and my plants are big bushy and around a foot tall already. I started using the liquid co2 at week 3 when I switched to 12/12. They were only around 4 inches at the time. The strains I'm working with are neville haze and green poision. I actually started in march with other strains but had a power failure and they didn't get any water for an entire day. Unfortunately those all died. =o( also, I'm using ionic grow & bloom for nutrients. I'm keeping the ppm at around 200 right now. Should I raise that? I don't want to burn them but I think I'm being a little too careful and don't want to starve them either..... Any help/advice please.