I have multiple questions that would be greatly appreciated if someone could gimme some pointers. First off I wanna know if a timer for my pump is nessecary, if so what kind of a cycle. 2. once my roots are through the coco pots how far down should i set the flow. 3. I added too much ph down and i fixed it with baking soda... Is that ok to do??? 4. Is it really nessecary to have a reverse osmosis water filter?