I peeps, firstly wanna say that I had been using straight tap water to feed my plants, now I live in a major urban city and the warm water had a cloudy appearance to it, I had since decided that it would be better to boil the water for a short while and then running it through a brevia filter to remove impurtities, I got myself a ph tester and the water was coming out at 7.5, however after boiling and filtering the water the ph dropped down to 5.7/5.8, now to get the optimum ph of 6.5 ive been adding a dash of bio - silicon by plant magic and it works a treat, peeps the question I wanna ask is that im now close to flushing, how can I increase the ph slightly without any additives that would interfere in the taste of the final product, I wanna be able to get the most out of my organic nutes by getting the flush right, all advice appreciated thanks