1- Lumalux's are decent bulbs. If it is 3months used then I think its fine to finish up this grow w/. IMO it is best to have RED spectrum for flower.

Big bud is great. I dont use the 5 ml per liter. More like 2 due to high ppms.

Peroxide should not slow growth if it is added propperly and it has never raised my ph.

Run a cleaning solution through your system during flush (takes away that black nutrient build up) Clearex and Floura Kleen are good.

ROOTS HATE LIGHT!