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8mls per litre of 3% h2o2 should be ok in the res. I can only buy 7% locally but I have seen 14% from one of the nutrient companies. Pretty sure I've seen it on Amazon as well. I must admit to only using the bubble cloner as I am lazy. Change the water every 2 weeks. If I am serious about...

I know you looked in the holes but that is not where you find them. They move around and usually by the time you see the hole the mite has moved to another spot. They look like tiny specs of dirt on the underside of the leaf. The younger ones will move when you shin a bright light on them. When...

Your ec out of the tap is 1, 40 that is really high and I wouldn't be drinking the water. Mine is 0, 4 which is also fairly hard but it works ok. I would be using ro or distilled water and see how you go

Ok nuts should be fine, I run the same here. You using tap water I assume and now ph every watering? You won't be getting any new growth as your close to done but you should be able to get undamaged leaves back to a healthy green. The spots you see are there any holes around the middle of the...

If you're using tap water you should just need Epsom salts. You can create more problems with too much Ca if you're not careful. Epson should be available at most home depot type stores and is cheap. It has different names in different languages ie in german it is called Bittersalz. I appy 30%...

600 real watts of Led or hps will both have similar cooling requirements. Led grows can be cooler as you can get away with less watts. The bud with Led tends to be smaller but is more dense in my experience. Yields should be similar if your putting the same amount of photons into the plant. I...

Reverse osmosis water could be better but you need to add calmag to it. I use tap water just fine. I need to add mg as I have high ca levels but otherwise it is fine. Bottled spring water and such would be a waste of money and could give you other problems which also could be brand dependant...

You have bugs imo. Nutrition problems usually affect the middle leaves at first, did you notice where it started?

My next light will probably be a cmh bulb. Seen some impressive results from growrrs using yhem. I run both led and hps currently. HPS is a good start, led will cost more but you should save something from running costs. Cfls are ok for supplemental lights but are too inefficient for main...

Holes in the leaf are usually pest problems. I would guess mites. The other thing is I sometimes get burning like yours from cfls. Hope this helps. Good luck grower.

Looks like a deficiency to me. I would expect the tips to be worse with burning. Ph your water if using tap water add some mg. Good luck grower

You are going to need to feed the plant otherwise you get what you got which you might get a couple of grams out of. There are plenty of low cost ways to do it. For nitrogen 5mls of pee per litre could work. Molasses has plenty of p or k don't remember now which. Tomato nuts should work well...

Plain old tap water sometimes I add a few drops of chlorine. The only times I get problems in a bubble cloner is when nuts are added. Adding rootbastic almost guarantees root rot.

It could be iron deficiency. You get dark veins but the leaf goes pale then yellow between the veins. Also check for holes in the leaf. Mites cause problems that can be confused with deficiencies. What nuts. Doesn't look like toxicity as the leaf is curling down. With N toxicity the leaf curls...

Update time 21 days since breaking ground. Been growing pretty slow this past week and canopy space is also getting tight. I repotted her this morning to try and get some growth going. Have fun growers

I would get the CFL a little closer :)

If you wanted to increase the blue in the spectrum wouldn't the most efficient way to just add discreet blues? It should be more efficient than getting it from phosphor conversion.

Did the box say what the percentage of total mg? Stuff I use is 30%. You don't want to over do the mg as you will cause other lock out problems such as Ca. Calmg is normally only needed in RO and distilled water. For regular city punch mg might be required but not usually Ca as there is plenty...

I hope the 20g/l of Epson is just a typo. I feed at 1g/l and find it plenty. Why Calmag, are you using RO water? I'm not sure you have a mg deff problem in any event. Could be mites or something like that as it appears to start at the bottom and work its way up.

I don't fully understand what you wrote but I am guessing you want to power the fan basically in parallel with the diode array. It could be done but is going to involve some more electronics if you care about efficiency. You could just use a series resistor in the fan lead but you will be...