Hydro unfortunatley with such a system this is exactly the problem......because you didn't test and check all your parameters before you now don't know what will work for you.....because without testing you can't even know what numbers worked for you before. To ask everyone to troubleshoot your un-ph'd tap water isn't going to get you very far.....I for one would never have put so much of my time, energy and money into a grow without at least a good ph and ppm tester. That's just begging for an issue imo.