Lucas formula and led lighting

croakersoaker

Active Member
Hi I was wondering if you could help me with the Lucas formula.I am going to run a small dwc it will be about a gallon.my lighting will be one 240w blackstar (actual draw 133 watts) It will be one plant that will be allowed to grow only one foot tall.can you tell me the amount of flora nova bloom per gallon I read 8ml but thAt was for hid over 400 watts. Also what about seedlings and how big till I can go full strength.I aPpreciate any helP you can give thanks
 

hellraizer30

Rebel From The North
Ive read that with LEDs you shouldnt use nute formulas designed for hids,
Lucas on his website has multible formulas for HIDs/LEDs and flourecent
Lighting.
 

mikadodarkside

Well-Known Member
Your problem is easily adressed.

Your only growwing in one gallon dwc, So if you mix up 1/4 - 1/2 strength nutes you should be fine. if you had a TDS pen you could determine if you nutrient solution was getting stronger or weaker as you water levels droped. you want them to remain the same so the plant is using watter and nutrients at the same ratio. that way you dont have to worrie about burning your plants or underfeeding them when water levels get low.

You really cant underutilized your plants, so i would start with 1/4 solution, see how it goes and then make your way to half strength. If you dont have a TDS pen then make sure you check the ends of your leaves for signs of burning after introducing new nutrients.

a lot of guys try to get their PPM to be as close to burning as possible(1500-2000). But truth be told this is a pain in the ass. you do get slightly more yeild, but personally i think the risk of burning outweighs that benefit. because if you burn your plants for 1-2 days and they recover for 1-2 weeks, you just lost like 30% of yield anyways. if you dont have a resovoir and are only using one gallon bucket.

for LED's dont mess with lucas formula, just be sure to replace with fresh mixture every few days, and start at low strength.
 
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