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So I'm thinking of switching from the Lucas formula to another line of nutrients. Going to go to the hydro store tonight or tomorrow and pick that up. I've had a few problems with this (my first grow), both nutrient deficiencies and multiple people (both online and in person) have been blaming...

Alright thanks, may or may not make it to the hydro store tonight, it might have to wait until tomorrow. Should I change out the res now? Since it seems like the problem started with the new res, maybe switch to just water? Or will that just make the problem worse? Maybe switch to Lucas with no...

Yea, I feel like I'm about to come to the same conclusion. From some reading it seems the excessive amount of P and K from Lucas in veg is locking out Ca. I'm feeding with CalMag+ already, so a straight Ca def doesn't quite make sense to me. Total PPM is 850, starts with 0 with RO water...

Room temp 75F, Res temp 65F, colder for the 6 night hours Looks like that to me too, but I'm already using CalMag+... From some reading, it might be that too much P and K in the Lucas formula locked out Ca?

Here's some better pictures of the progression of those spots. What the hell is going on here? First pic is yesterday again, next 3 are from today...

Indoors, in a 3'x3' closet, 400W MH w/ 265 CFM air-cooled hood, being fed with RO Water, Lucas formula and CalMag+ at 1.25 EC (875 PPM on .7 scale), res was changed on Wednesday before problem started appearing and exact dosage was: 2gal RO water (000 PPM) 10ml CalMag+ (brought solution up to...

Looking forward to the results

It's been 3 weeks of veg since I got the clone, planning to throw her into flower either Monday or Wednesday. We'll see how she looks on Monday and I'll make that decision. Noticing these rusty spots on the new growth. In person you can almost see other spots where these might be forming...

Res change today as planned. The last res lasted 12 days and needed no PH adjusting, was 5.5 12 days ago, and was 6.3 this morning. 2 gal RO H20 (tested with EC of 0.00) 10 ml Cal-Mag Plus (brought PPM to 210) 10 ml Flora Micro 20 ml Flora Bloom EC 1.25 (PPM 850) PH 5.5 no need to adjust no...

Just wanted to say thanks again, my grow is in full swing now and the tea has kept me completely slime free so far!

So I came back from the long weekend (plant was alone Wednesday at midnight to this morning 2am) and she looks great. PH was at 6.1 when I came home, EC had raised to 1.7 but after topping off with plain RO water it went back to 1.3. I FIM'ed it 6 days ago, and I think you can see the results...

So I'm not going to bother adjusting the PH before I leave, if's risen from 5.5 to 5.8 in the 5 days since the res change, so it should be good until for the next 4.

Not sure I'm going to top it, but I will leave it alone for a week. Now that the numbers are good the new growth looks green, everything seems to be going smoothly. I'm leaving for 4 days for the holiday tomorrow night, so will adjust the PH back down tomorrow afternoon and hope for the best...

Been battling with her over the last few days, trying to find the right nutrient level. I was under, then I was over, etc... Things are looking better now, new growth seems okay. Should I remove the badly damaged leaves? EC is around 1.3

So I just did a res change, sterilized a new bucket, added 2 gal RO water, 16ml GH FloraMicro, 32ml GH FloraBloom, and 10ml CalMag+, along with 2c of Heisenberg's tea. PH mixed out perfect at 5.5, EC was 1.8 We'll see how it goes.

bump... please help? About to do the res change...

Hey guys, I'm 8 days into my first grow and am running into a bit of a problem: I'm growing in DWC under a 400W light, using the Lucas formula w/ RO water. 8 days ago when I put the clone (in a 1.5" rockwool cube) into the hydroton I filled up the rez using the same ratio as the Lucas formula...

The nutes I referenced are the classic Lucas Formula. I think I'm using the correct ones, GH Micro and GH Bloom are used throughout when you are using the Lucas Formula. I will bump them up to full strength though if what I'm seeing is signs of underfeeding./ Thanks!

They just keep coming! So I'm going to do a res change tonight. I started noticing these dark spots on the leaves yesterday, I think it's from when I top-fed it before the roots started popping out and some of the nutrient solution splashed onto the leaves. The spots were never yellow as far as...

You might want to look at a bigger or additional air pump. The more air the better. Check out the wattage on the pump, general rule of thumb is 1 watt per gallon in your res.