Yes I too am making a mistake. I have a YT in a 55, shamefully, ith a small Huma Huma. Thanks to the wonderful LFS info I made the purchases. Then I found this site. My only saving grace is that they are both young, and small. My tank has been up for 8 months and all the params are good. So while my freinds 150 gallon tank with 100LBS of LR is cycling I am keeping the YT. But when his is ready and up for a few months, He is getting my YT. He seems happy now, but I don't want to wait for him to get un happy.