Backyard Aquaponics
A place to discuss aquaponics

Hi,

Just want a bit of hand holding. Looking through the threads and am I correct that this is a Potassium deficiency?






Water tests are

PH 7
Amm 0
Rites 0
Rates 30ish

Showing mainly on the new growth in the towers (strawberries and basil) which are fed from the sump. Although it is starting to show on basil in the grow beds also.

FT -> Swirl Filter -> media/DWC -> sump -> strawberry towers/FT


Been foliage spraying with Seasol. Started this last week, too soon to see results? I also add seasol every so often. Not sure if I'm adding it often enough or that I'm putting in enough (approx 1 cup) every fortnight.
Running nearly 8000ltrs in the system now.

Thanks

where's scotty when you need him?

I'm just guessing here, but if its mainly on the new growth it could also be an iron deficiency?

+1

Thanks for the replies,

I have some Iron Chelate any idea how much I should add. Direct to the water or foliage sprayed?

Nate story does a good video on it here,

https://www.youtube.com/watch?v=qczagOJ ... rVknP2qlnY

my FT is also about 8000L and I have the EDDHA 6% iron and use about a table spoon every month or 2.

any more and the water goes blood red!

Thanks Slowboat,

That's exactly what I needed.

I also found the topic on dosing the system with seasol. Been underdosing on that too. Think since we started the system we have been very wary of chucking extra stuff in. Didn't want to hurt the fish, which in itself is a bit a joke seeing as what we have planned for them!

Cheers

As slowboat says plus you can Foliar for a quicker response.

slowboat doing the same with eddha 5 grammes monthly,then a very week mix weekly as a Foliar top up/tonic, nothing showing iron deficiency and as you say the water although red is not blood red.

I use blood and bone for Iron, and other elements, which turns the water a bit brown for a day or so- and no long term raspberry cordial effect

Thanks for the replies,

will continue with the foliar sprays. Think I also have the wrong Iron Chelate for my PH, so dont think that has been helping the situation either. I'm assuming that the stuff for low PH levels still should be OK as a foliar spray - just to use the stuff up?

Gunagulla, do you only douse your system with blood and bone and at what rate?

Thanks again.

Ozgal, I add 100-200g of B&B and Seasol every week or two (no fixed schedule), I generally just tip it all into the sump. I also add KOH every week or so- 50-100g, and Ca(OH)2 when the fish are eating a lot. At low feeding rates the plentiful shell grit (CaCO3) in the GBs provides enough Calcium, and almost enough buffering against acidification. I'm running around pH6.3-6.4, kept in check with the KOH, and Ca(OH)2 when feeding lots.

Thanks Gunagulla,

If I can get my veggies looking as good as yours I'd be more than happy.

..
FWIW....

Many of my strawberries went that way and some totally YELLOW...

an simple spray with Iron-Chelate saw a flush of dark green sweep across those leaves..

good advice taken -
PS

I understand that as a FOLIAR spray, it does not matter.. just a bit slower perhaps.. but WHO cares - it works..
..
.

The PH for foliar sprays as i understand it, are PH 7 for young plants,low sixes for older more mature plants.

Great info, if that lot doesn't fix them, I'll get the green paint out.

Thanks again.