Hello guys just to share my experience trimming the ST Tail .I noticed about two months the spilt tail cannot grow back maybe to wide open . So do a bit of operation what I did no need to sedate the ST but I off the tank light while catching the ST with big net and lay the fish at wet towel . Then cover the eye with the wet towel while trimming need to hold the fish firm. Items use sharp scissor and razor blade then trim till the tail spilt stop. After that use the razor blade shred the tip of the tail 4-6 times this make the tail grow back like original fan tail . Returned back the ST to main tank and put salt 3teaspoon need to dilute first then pour into the tank . The picture before and after .

Before the trimming


After the trimming

Close up view