Terra Aquatica - FlashClean-5 Litre Media It's diluted with water before

It's diluted with water before use and sprayed across the whole leaf surface rather than applied as a root drench

Advanced Nutrients Coco Cultivator Plus 70/30 50 Litres - Balanced Coco and Perlite for Hand Watering

and the engineering speaks for itself

Feeding strength

Terra Aquatica - FlashClean-5 Litre Media It's diluted with water beforeTerra Aquatica FlashClean 5 Litre Complete Feeding, No Guesswork Mineral feeds can cause residues of salt to build up in your substrate (medium) and end up causing blockages or even a slow down in plant growth. General Hydroponics FloraKleen keeps your system clear of those precipitated mineral salts to keep your system running sweetly, and to make sure your plants don't suffer nutrient lockouts etc. due to salt build up.