Lucas formula help

I'm having trouble getting proprer ppm my tap water is about. 250 ppm I'm adding 5 ml oh flora micro and 10 ml of super flora nova and I'm getting around 1500 ppm with a hm tds-4 I calibrated it with 27.7cf and got about 1330 which is the comversion for ppm

Muffromper said:

I'm having trouble getting proprer ppm my tap water is about. 250 ppm I'm adding 5 ml oh flora micro and 10 ml of super flora nova and I'm getting around 1500 ppm with a hm tds-4 I calibrated it with 27.7cf and got about 1330 which is the comversion for ppm

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I dont do Lucas formula but arent you supposed to be using Floramicro and Florabloom not the flora nova line...
By the way I only clicked on this thread because of your name lol cracks me up..

sounds like your adding the one part grow and one part bloom???

I just picked up flora bloom and my ppm is 770 with 250 ppm water is this good?

General Hydroponics Flora Series Feeding Strategy - Lucas Formula

G-M-B (Grow-Micro-Bloom)
0-5-10 - For Vegetative cycle (18/6)
0-8-16 - For Flowering cycle (12/12)

The numbers above indicate the number of milliliters (ml) of Flora Grow, Micro or Bloom formulas that I use in one gallon (US Liquid) of nutrients.

You will notice I dont use any of the Flora “Grow” formula, do not need to, the Flora "Micro" provides plenty of Nitrogen.

There are two ways to work with this formula:

1. Top off the reservoir daily using a pH corrected water solution as required to maintain full reservoir level. After adding back an amount of water equal to the amount of your reservoir capacity you should change the reservoir and put in fresh solution.

2. Top off the reservoir daily using a pH corrected 100% strength nutrient solution as required to maintain full reservoir level. Continue to use this nutrient solution without dumping the tank unless the PPM rises above acceptable levels.

Between vegetative and flowering cycles you should dump your nutrients, then flush (possibly with Clearex) to remove salt buildups, then change to the other feeding program. Always shake your GH nutrient bottles before using them!

For young plants, just transplanted into the hydro setup, give them 50% strength nutrient mix to prevent overfeeding them while their young. Gradually bring up the mix to full strength as they grow over the next few weeks or so.

The lucas formula is normally intended for use with RO or near 0 PPM water.

NOTE: The Lucas formula eliminates the need for Epsom salts to correct (Magnesium) Mg deficiencies in most normal feeding programs recommended by manufacturers. Cannabis needs a lot of Magnesium to thrive.

The Flora Micro is providing the Nitrogen and the Magnesium in the proper balance, thus there is no need for the Grow formula and little or no room under the maximum acceptable ppm limit of 1600 @ 0.7 conversion.

Calculated EC/TDS levels:

EC microsiemen:
0-4-8: 946 µS
0-5-10: 1184 µS
0-8-16: 1894 µS

TDS @ 0.5 conversion:
0-4-8 = 473 ppm
0-5-10 = 592 ppm
0-8-16 = 947 ppm

TDS @ 0.7 conversion:
0-4-8 = 663 ppm
0-5-10 = 829 ppm
0-8-16 = 1326 ppm

Addback Calculator - (For Advanced Users)

Say you were running the 0-8-16 formula, at 0.7 conversion with a 22 gallon res. When you first fill it up, your ppm will be around 1330.

Now you have been growing for a week, and some of the water has been taken up by the plants, some has evaporated, and now your res is at 947 ppm. You need to get your ppm from 947 to 1330. Here is the equation:

((target - current) / target) * 8 ml per gallon * res gallons = Flora Micro (ml) double this figure to get Flora Bloom (ml)

Example:

((1330 - 947) / 1330) * 8 * 22
(383 / 1330) * 8 * 22
0.3 * 8 * 22 = 53 ml Flora Micro

53 ml Flora Micro, double that and you get 106 ml Flora Bloom. So 53 ml Flora Micro and 106 ml Flora Bloom to add back to your 22 gallon res to get you from 947 to 1330.

The Lucas Formula using Flora Nova products do not call for micro. Just 8ml of Flora Nova Bloom per gallon.

Here is a link that is easy to understand and read for different nutes and Lucas Formula conversion

http://lucasformula.com/

Muffromper said:

I'm having trouble getting proprer ppm my tap water is about. 250 ppm I'm adding 5 ml oh flora micro and 10 ml of super flora nova and I'm getting around 1500 ppm with a hm tds-4 I calibrated it with 27.7cf and got about 1330 which is the comversion for ppm

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It sounds like you bought the wrong bottle first or were shipped the wrong bottle but now have all the right bottles. The lucas formula is based off of Mel Frank's recommended feedings. You can get that by using the micro-bloom with the 5-10,8-16 or with the super flora nova at the dose somebody already pointed out. I hear the flora nova has more in there though so it might be better? I don't know. Either way with your low ppm I wouldn't worry about the ppms, just mix up your shit and if you see tip burn the next time dilute a little with water. Unless of course you are keeping it constant with add-backs and nutes in which case do that and take a ppm reading and keep it.

the flora nova grow is nice for veg, no mixing or anything like that. very simple to use, i just did a veg water change using ro that starts at 3 ppm, i add i tsp to 5 gallons and gives me roughly 250 ppm. i also use nova series bloom in addition to the liquid kool bloom and the soluble powder kool bloom for the last two weeks. my formula for today on my res change was, 20 gallons ro water, 5 tbsp one part bloom,10 tsp cal/mg, 5 tsp nectar,16 tsp liquid kool bloom, 5 tsp dry kool bloom. ppm is at 1000 even with just a bit of burn on the tips, like 1/8th".i very impressed with the nova one parts for veg and bloom.

dart420 said:

the flora nova grow is nice for veg, no mixing or anything like that. very simple to use, i just did a veg water change using ro that starts at 3 ppm, i add i tsp to 5 gallons and gives me roughly 250 ppm. i also use nova series bloom in addition to the liquid kool bloom and the soluble powder kool bloom for the last two weeks. my formula for today on my res change was, 20 gallons ro water, 5 tbsp one part bloom,10 tsp cal/mg, 5 tsp nectar,16 tsp liquid kool bloom, 5 tsp dry kool bloom. ppm is at 1000 even with just a bit of burn on the tips, like 1/8th".i very impressed with the nova one parts for veg and bloom.

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Curious, I am just now attempting a GH FloraNova "Expert Recirculating" [as per: generalhydroponics.com/site/gh/docs/feeding_sched/GH-FloraNova-REC-Charts.pdf] feed program after using Botanicare for years. After mixing the nutes to the exact specifications for transitional period, I was very surprised to notice my TDS hovering around 400. Seems this may be ok? Thanks in advance for anyone who may have input on this, it's just very peculiar to me after expecting 1200+ at recommended dosages.

TGR said:

Curious, I am just now attempting a GH FloraNova "Expert Recirculating" [as per: generalhydroponics.com/site/gh/docs/feeding_sched/GH-FloraNova-REC-Charts.pdf] feed program after using Botanicare for years. After mixing the nutes to the exact specifications for transitional period, I was very surprised to notice my TDS hovering around 400. Seems this may be ok? Thanks in advance for anyone who may have input on this, it's just very peculiar to me after expecting 1200+ at recommended dosages.

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In case anyone searches and actually needs this information, I simply wasn't properly shaking the nutes up enough. I'm sure someone knew that, but apparently didn't care to share. And that's why I'll also recommend International Cannagraphic forums, no eego, just practical information.

My floranova always has a red label on the cap that says "shake vigerously" I suppose they can forget to put them on once in a while.

A lot of good info concerning the Lucas Ratio on this page,

https://www.greenpassion.org/index.php?/topic/30423-lucas-formula/page__hl__%2Bwhat+%2Bppm+%2Bused+%2Bwith+%2Bgeneral+%2Bhydroponics+%2Bnutes__fromsearch__1