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Here's my situation: AK-47, week 8 of veg. Potted up in Bat Mix (4-16-4) 4 weeks ago, suppliers say this has enough nutes for 6 weeks, so no other nutes. Watering on a wet dry cycle, temps between 70-85, humidity 40-50% I've got a little tip burn, but more worryingly a LOT of yellowing /...

I know lower leaves go yellow and drop off but these littluns are only a few weeks old so it doesn't seem right. They're in Bio Bizz Light, watering twice a week, fed 1/4 dose of of Bio Bizz Grow once a week, 600w HPS, Temps are 75-85, Runoff is Ph 5.8-6.5 and Humidity is too low at 35% RH...

I've got a 600w hps in a 4'x4' tent and have these two options, which would run cooler? I can either afford a bigger filter or a hood atm, not both :( Passive Intake > Air Cooled hood > 200-400 CFM Extractor Running alongside Passive intake > Tent > Carbon Filter > 100 CFM Extractor OR...

15 day old seedlings are going a bit wrinkly, are they healthy? I've been giving them about a cup of water each every 2 days, but my 600W dries the topsoil up pretty quick so I've been dampening it with say 1/4 cup every other day. Temps are at 81F right now and the surface is pretty damn...

15 day old seedlings are going a bit wrinkly, are they healthy? I've been giving them about a cup of water each every 2 days, but my 600W dries the topsoil up pretty quick so I've been dampening it with say 1/4 cup every other day. Temps are at 81F right now and the surface is pretty damn...

I've seen a lot of accounts of chimneys making a good output exhaust but was wondering if anyone has used it for cool/fresh air INTAKE? My flue isn't used at all (fires / gas boiler) and I can feel the air in my fireplace is noticably cooler, so it makes sense to me. Obviously I'll want...

Obviously this temp is way too much, am trying to work out the best way to fix it. I've got a 4" inline extractor fan (187 m3/h) running via a filter with passive intakes in a 4x4' DS tent. There is no outside intake but the room the tent is in is well ventilated and about 60F. Have seen...

Got a 4 day old seedling at 2.5", worried about stretch so I put my 125W CFL a few inches from the leaf tops, now temps are around 90F, but no signs of burning. Should I relax about the stretch and sort my temps out, keep em hot and short or get my 600W HPS out and try with that? Ta!

Lighting: 600w HPS, 150w CFL to start off. Venting: 4" Fantronix TT100. Nutrients: Bio Bizz Grow, Bloom & Top Max. Area: 4'x4' Secret Jardin Tent Conainer & Medium: Bio Bizz Light soil, 1L & 15L Air Pots. Method: Might do a bit of LST? Seeds & Strain: 6 X Serious Seeds AK-47 Easy all, cutting...