Dr. Tim is full of information that takes the guess work out of building a healthy, thriving aquarium. I WISH I would have listened to hit when I began the hobby 6 years ago; would have saved me a lot of headache and heartache. I can listen to his teachings over and over, and every time, I will learn something new. Sometimes it is hard to understand because it is super scientific, but you begin to understand through active listening, and rewinding. He brings it together always in the end, to help you understand. Absolutely amazing. Thank you for sharing your knowledge!