A good rule of thumb growers use is to have 50w per square foot. In a 5x5 area is 25 sq ft, if we times that by 50w per you get 1,250watts. Therefore a 1000w is best suited for 4x4 - 5x5 areas.
You're not going to just put the light at the very top of the tent and have it work, you need light...
Definitely get some SNS-217 and spray them with that, focusing on the underside of the leaves.
You have to use preventative methods in order to stop them. Spray with Aza Max and SNS weekly until you're week 2 into flowering. This almost always prevents any bug problems from ever occurring.
Stay away from Lumatek, used to be one of the big dogs with great products. Not so much anymore.
Quantums seem to work out well and have cheap prices. Stick with a Sunlight Supply made reflector if you want brand name and high quality. Made in America.
Advanced LED is a good option for you...
Use this as a guide for the Canna products: Your Personal - CANNA Grow Guide - Feed Schedule - Feeding Chart | CANNA
Remember to use half of what they recommend when starting out and work your way up.
As for the other product you can add it each time, the back of the bottle should say what to...