Don't use distilled because you are missing out on valuable nutrition that's in the tap water (micro nutrients). You should be filling 5 gallon buckets of water out of your bathtub and let them sit overnight to evaporate most of the chlorine, then PH adjust to 5.5-6.5. this way you wont see deficiencies from calcium and magnesium.

During fast growth you might have to water every day. Keep the soil moist at all times, it should never completely dry out to the point of plants wilting and the soil dry as dust. A good way to check is stick your finger in the soil and if you feel it moist in the top 2 inches of the soil then its ok, but if you don't feel much or any moister then it needs watering. You can transplant into larger pot sizes with more soil so that it will stay wet longer.

11 plants cant flower properly under the 1000W hps, there's not enough light. Maybe half that would work, but ideally 3-4 plants for a 1000w unless they are very small plants. The MH light seems a little bit too high from the plants, you should have the light as close as possible without burning the plants. Put your wrist between the light and the tops of the plants, if the light feels uncomfortable(hot) for your arm, then the plants would also be uncomfortable with that much heat. So lower the light until you think the plants are getting the most light, but not to much heat. If you have a fan blowing on the canopy this helps the tops to stay healthy and unburned from the heat of the bulb so you can get the light closer.