Calcium Hypochlorite [Ca(ClO)2] dosage

Discussion in 'Hydroponics / Aeroponics' started by CobKits, Sep 9, 2018.


    CobKits Well-Known Member Rollitup Advertiser

    i mixed up some homebrew clear rez last year, fortunately i wrote 1g/gal on the bottle. If i recall, this was basically a concentrate and cant remember what the safe dosage is for cloner and/or ebb and flow res.


    CobKits Well-Known Member Rollitup Advertiser


    eyderbuddy Well-Known Member

    great, thanks for sharing

    rkymtnman Well-Known Member

    if you don't want to make a stock solution, the formula is 0.10 g/10 gallons for 1ppm free chlorine. i ran at 3ppm with no issue. up to 5ppm is safe for humans and plants.

    klx Well-Known Member

    What's the benefit of Cal. Hyp. over H2O2? Cost?

    jijiandfarmgang Well-Known Member

    They are both oxidizing agents, but yeah Calcium Hypochlorite is cheap.

    - Jiji
    klx and rkymtnman like this.

    CobKits Well-Known Member Rollitup Advertiser

    i had great results this time. cloner plants getting root callouses on day 8, changing res today,in the cloner those were all 4-node big tops i took (~3/16" stems) because i wanted the clones obviously,and also to force branching

    while stripping nodes on the clones i took the smallest branches off those tops (~3/32" diameter 2-3 nodes), and threw them in root riots. along with some bottom suckers of the same size off the same plants, also into root riots. im seeing the first roots out of those today as well on day 8

    after having almost 100% success rates cloning into rockwool under 15" T12 going back 20 years, a few years ago i suddenly started to suck at cloning.

    i think the biggest difference with this one is stronger light. i put the clones just off to the side of the same veg light and actually measured the light, they are enjoying 80-150 ppfd and throwing roots early before any rot can get a hold. and just being mindful of all the aspects, super sterile technique, temp and humidity, etc.

    i also SOAKED all stems in dip and gro (20:1 dilution) for 30 seconds to a minute to really let the hormones penetrate, just developed a technique that while im prepping the next one, i have a clone soaking in solution instead of a quick dip

    i really think the stronger light was the biggest factor. its a race against time to get them roots and out of that humid mold-prone environment

    never to old to (re)learn i guess. my last clone job before this was a disaster because the light was 25-50 ppfd and i lost way too many to mold before i could get roots. maybe 20% success so i rallied to get it together this time,

    CobKits Well-Known Member Rollitup Advertiser

    is that accounting for the ~60% strength of the Ca(Cl0)2?
    rkymtnman likes this.

    rkymtnman Well-Known Member

    yep, based on HTH pool shock %.

    CobKits Well-Known Member Rollitup Advertiser

    arggh... did the same thing and got the slime this time. day 7

    im going to change the res asap and double up on the hypochlorite, not sure what to do with the cuts though? rinse the slime off manually? recut and redip in rooting hormone? dip briefly in a more concentrated hypoclorite?

    rkymtnman Well-Known Member

    for slime, you might want to check out flying skull Z7. it's an enzyme root mixture that is supposed to get rid of the snot/slime.

    CobKits Well-Known Member Rollitup Advertiser

    looking for something to use right away. i have some (old) SLF-100, wonder if it would be of use

    eyderbuddy Well-Known Member

    in my experience, more light just finds a way to get into the water and encourage slime, really!

    A bit of recharge (bennies), and a small pump do wonders to keep the water slime free
    Beachwalker likes this.

    CobKits Well-Known Member Rollitup Advertiser

    i triple checked this with that online calculator and also my own math from scratch and its the right order of magnitude but 0.1 g will raise 10 gal just under 2 ppm. so your target 3ppm was probably right about 5 ppm

    i just made a fresh solution of 10 g/gal concentrated solution, and 10 ml of this concentrate per gal of res water raises chlorine 4.5 ppm. test strip shows right where i would expect.

    10 g/gal and 10 ml/gal are easy to remember
    rkymtnman and SSGrower like this.

    shawnery Well-Known Member

    You might try alternating between pool shock and h202? Some people I read say never do it but I've been having success so far in my new cloner. The reasoning behind this is though both are oxidizing agents but h202 will also add a shit ton of oxygen.

    I dose my cloner at .3 grams of pool shock per 10 gallons every 3-4 days and add h202 every 3 days days but staggered.

    I got the hth dosage from rocky as well!
    Johnny Lawrence

    Johnny Lawrence Well-Known Member

    Z7 works. I prefer bennies, but Z7 does an alright job.

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