Backyard Aquaponics
A place to discuss aquaponics

Thanks for taking the time to reply dasboot and gmturner, appreciate it.
The reason I thought calcium was because of small fruit with a dense cover of seeds.
It seems that they are the standard AP deficiencies so I need to get onto it asap. I've added iron chelate and magnesium, (Epsom salts) with both foliar and water addition however I only have the Eco fungicide which may raise my Ph. What is another readily available remedy?
Thanks.

Not sure your water capacity but i have used Potassium sulphate,this doesn’t raise PH,i would dose 4-1 Potassium,Magnesium and i would start at the standard dose of 1 Tsp per 1000 litres for the Potassium,i would also keep up with the Foliar application,once a week or even twice per week in the begining until such time they start to improve.