sorry guys i havent been getting email notifications as i said i replaced the nutrient with plain water and little did i know my digital timer was stuck on 24/0 so theres my reason the plants were over watered and droopy i have since put them on 30min feeds once every 3 hours they are loving it tonight i will go back to 50% nutrients the nutrient i had been using was "Total Growth" made by R&D Aquaponics an Australian business i have changed to Europonics the PH did drop from 6.2 down to around 5.8-6