Backyard Aquaponics
A place to discuss aquaponics

Iron Related issue which ive already order FeEdpa Chelated, also maybe a Cal,Mag,K Lockout in my system...
I Have Top Growth Chlorosis with Necrotic Spotting/Leaf Margins are also Cupping
Some of the lower growth has Tips Turned Down, an some of the tips are doing this S like Curl Down then Up Thing along side the tips turning Yellow Then Brown Throughout Most the plant...
Top Leaves are Cupping on the Margin an some of the tips are alittle brown...

The Tank Itself is 10G but i run it 75% Full w/ Another 10G 75% Full Sump
Ammonia, Nitrites, Nitrates are Normal at 0-0-30 to 40ish
Water Is Considered Soft
KH is Considered Low 2 Moderate
Substrate is Clay Pebbles aka Hydroton
Grow Room Temp: 79-81
RH: High 50s Low 60s Most Days
Water Temp: Always Seems to be around 75-80
Lights: 24" Above Plant
Fans: 1 Circulating Out, Other Circulating In

Well i also thought it could be a Phosphorus Toxicity considering iv had to use a lot of Ph Down Recently, Every day i have to add about 5ml to keep the system withing a 6.5-7 Range

Can you post a pic?

Why do you say "Cal,Mag,K Lockout"?.Have you been adding something?

79-80 is a little on the high side (grow room).

What lights are you using?

I forgot to mention,your KH is only holding the PH in place.The more acid you put in the less KH you will have.But if your GH is massive,the PH will still be high even when you have no KH.If you have 0DKH the PH could fluctuate.

A lot on here say to add acid to bring your PH down,but that only works for some who have fairly low GH & moderate - high KH.

You need to mix pure water with your tap water,pure meaning 0GH & 0DKH.

Phosphorus toxicity is a problem when you're adding it like that.And if you add Hydrochloric acid that many times,eventually no plants will grow.