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Combination MH/HPS lights really are not necessary anyway, so no great loss. meh... I put clones, which have been under fluoros for about 14 days, straight into the flowering room under 1000HPS with never a problem. I hope fluoros are enough to raise your mums. If you're running a...

OK. Algae does eat a small amount of your nutes, but not enough to worry about. However, it's not the algae raising the pH, it's pathogens like pythium and fusarium, which are probably present due to overwet conditions, causing the pH to jump.This is indicative of root problems. You'll...

Eye/Hortilux is a reputable maker of good quality HID lamps. If their testing indicates that acoustic resonance is a problem for HPS tubes, I'm inclined to take their word for it. One thing I can tell you as a result of my ~35 years as an electronics techie is that I have never seen a...

Low RH will indeed cause higher transpiration- not a real problem. However, if you're unfortunate enough to get some spider mites, low RH will increase their reproduction rate significantly. Should be OK in general, but I do have problems with the Hempy concept. Allows roots to sit in...

I'd be nicer if you were smarter. Still think I use 75mm cubes? xD

That's like agreeing to disagree on whether or not gravity works. Squeezing RW cubes collapses the airspaces in the RW. It's a bad practise that will contribute to poor rooting performance. You're absolutely entitled to do it wrong if you want, but it's still wrong. No, it's not possible...

Top feeding systems are generally known as drip systems. These use dripper aperture heads that have a tendency to clog with nute salts. Vertical gardens are ambitious. And complex. Lemme tell ya something about growing dope: it's a hell of a lot of fun for a few years... then it becomes...

There's several watering methods that perform better than flood systems. Aeroponics & NFT can get quite a lot more oxygen to the roots. However, aero systems are a pain in the ass to maintain and NFT systems sacrifice plant mobility. Flood systems are stupidly simple to set up and maintain and...

zem, the system he's having a problem with is a run-to-waste, not recirculating system.

Well, now you know why I suggested the plastic trash can might be a problem! It's one of the few variables between the system that has problems and the ones that don't. Bear in mind that even a drain to waste system's rez tank needs to be dosed with H2O2, 50% grade @ 1ml/L every 3-4 days.

heh, the 'pure organic' wasn't. If a nutrient is truly organically sourced, it'll fizz when H2O2 is added.

You'd be surprised how little force it takes to deform RW cubes. However... If you're getting roots in no more than about 10 days, it's working OK. I frequently get roots out of the bottoms of 40mm cubes in 5-6 days. OK. Cutting stems under water isn't necessary. Some old-school florists have...

Don't put a rubber band around RW cubes. This will crush the material and remove all the airspaces from it. Use larger cubes. The 40mm cubes are ideal. Larger ones tend to stay wet too long and cause stem rot.

I use 40mm cubes because 25mm cubes are too prone to drying out unexpectedly. My cubes don't look so small when you consider taht the clones I cut are about 8-9" tall on average.

No, I don't think the plastic in the trash can is causing the problem- it's really just a last ditch guess to explain what's happening- it's one of the few remaining variables. If you can't find out if the nutes are organic or not, mix up a small amount of nute solution (about a litre) and add...

Please go back and review the cloning thread. All specifications are detailed. In short, I use 40mm plastic-wrapped RW cubes for cloning. The clones in 40mm cubes, once rooted, are then planted into 175mm dia pots of Fytocell (with 25mm of RW floc packed into the bottoms of the pots to keep...

I don't understand "after 2 rom a fresh res change." I am not generally a spelling/grammar pedant, but if I have to guess to divine what you mean, you're not helping me help you. I've never heard of "NSR green leaves" before. Is this an organic nutrient? If so, this could be reacting with...

Pineapple! A cannabis plant's natural food, right? :D

Thanks. :) There's easier ways to bump one's post count than being nice to me- which I truly do appreciate, BTW. Thanks, MM. :)

With all due respect to Jorge (and that's quite a lot), sugars have no place in hydroponic systems. Vascular plants can't eat them. Sugars may have some use in soil-based cultivation, where microbes which break down organic matter into N, P & K may benefit from application of them. However, in...