I have not use loop syphons but did have a bell syphon on my small system....
I found that I continually had to "tweek" it to keep it running properly. This may have been due to pump inconsistencies but it got old very fast.....
I converted my GB to a continuous flow using a standpipe to regulate amount of water in my system.
My system is now doing better than ever before....
That is just my thoughts and experience...
Let us know what you are doing and WELCOME to the addiction!