Hi cotton0627
If we all had the same size tank, same filtration/equipment, same lighting, same fish and inverts, same feeding schedule and same water quality .... it would be very easy to agree on "the best methods" for taking care of our tanks.
Fortunately .... we don't all have the same stuff or it would be a rather dull hobby.
So many variables leads to many opinions on both equipment and techniques, and you are so right ... the information sometimes seems overwhelming. Contradictions and differences between one method and another can get confusing, and be totally opposite advise.
Taking an average only applies to values and numbers, not actual methods, and even taking an average of numbers can be dangerous as well.
Personally I think first hand experience is the best teacher, but having a trusted "friend" or buddy in the hobby that can guide you by showing you how he/she runs the tank is also great.
If their tank looks great, all the creatures are thriving and their water quality tests are good - listen up.
If they lose a lot of animals, tank looks crappy and are always battling disease or other problems - chances are they're struggling on their own, and I would not take their advise as gospel.
Seeing is believing.
Your own experiences are the best.
Reading and the internet are both a great way to learn - but as you've mentioned - lots of different opinions.
There are some very knowledgable people in the hobby that do a lot of research, have years of experience - they are considered the "pros" and I find their information credible.
You'll know them when you read their articles - they're the ones in the hobby that "support" their techniques and methods with "facts" and research data ..... not just blind statements and regurgitated answers.
It's just the nature of the hobby.
Soak up as much information that you can from all your sources, look at what other's are doing, look at results of different methods - not opinions.
Weigh it all out in your own mind, what makes sense to you and your tank(s) and focus on the end result.
In most cases - no one can tell you what is best for your tank/fish/inverts/water with 100% guarentee except you.
Here on this board - you'll find that you can get some pretty good advise, from some darn good people.
Although still sometimes contraticting, other times not.
Ask a lot of questions.
Question the advise.
Make your best decision.
See how it works for you and your tank.