The folks on here, like Beth and Sir Quizzy, have invested alot of money and time in there set ups. The advice they give seems quite conservative, but if followed, will do the most to give the optimal chance of success. Can some people take short cuts and do ok. Maybe, but alot of people get into this hobby and are given disastrous info and when they are looking at $1000 or $2000 in wasted livestock and equipment, give up. I look at it like this, if you take the time and use patience (both of which I am terrible at), you give yourself and the livestock the best chance. Conversely, if you have made some mistakes, like I did, try to make the best of it and learn from it. My wife was ready to make me ditch the 125 gal tank because of my errors.