ive used heavy for 3 years and prime wont clog your system, your only using 2-4 ml of prime,shake it well...every drip system requires maintenance,flushing clogs etc, heavy wont increase that beyond basic upkeep
using the phillips 2 wire bulb i cut 4k out of my room, less power, less cooling,more bang for my buck and makes my setup easier to manage epspecially during summer months
runoff up to 25% higher than feed ppm is fine, just back your nutes off and feed more frequently to flush and lower runoff...drip clean shouldnt be added full strength if you havent been using it, it can unlock salts too fast and fuck your plants up, ive added it gradually, thenm ramped up...i...
i use hydroton and chunky perlite,better drainage and aeration, im in beds, its key to give them drying time while establishing rootzone, then u can water the shit outta them...i feed beds less than a minute a day, 2 short feeds, i might bump it up to 3 in a couple of weeks and see how they respond