Clown Loaches tail fins getting thinner?

a few of my clown loaches' tail fins are very thin, it's usually like a "Y" but the branches of the "Y" that used to be maybe 1/2" are now only say 1/4". Any thoughts? They do fight, could this be it?

There doesn't seem to be any white spots or anything...I thought tail rot at first. I can't get a pic :/ no camera.

Thanks guys, Sj

hi.
do you mean like see through kind of thin ?

Need tank stats,(ie) readings for ammonia,nitrites,and nitrates along with water change info how much and how often? If ammonia and nitrites are zero consistently,and nitrAtes are twenty or below, Then nipping could be a factor. Clown loaches like lots of water movement and lots of hiding places or places to explore. Think powerhead or two for current and large flat pieces of slate laying upon smooth riverstones and or driftwood. They also need some form of vegetable matter in their diet such as spirulina flake or pellets. I would also look with suspicion at the Black Ghost Knife. Because you don't see any during the day,, doesn't mean there isn't nipping from the BGK after dark. Clown laches I have kept will develop a pecking order but the loss of fins sounds more like possible enviornmental problems. I would take pains to see that water parameters were in order and observe the fish to see if improvement is'nt noted. If not , Then I might remove the BGK temporarily to quarantine if possible and see if that helps. I'm no expert ,, but this would be what I would try first. Clown loaches are quite sensitive to many medications and meds may not be needed.

I will get stats tommorow but I can almoist guarantee 0 ammonia, nitrite, and low nitrates. Well cycled aquarium. I do not have a powerhead etc. for my loaches.

I do not have a BGK nor have one with the clown loaches, it is a wanted fish.

Thanks for the comment. Scott

p.s. If the water quality was bad (ammonia etc.) wouldn't you expect ick on my loaches? not a bit of indication of ick.

Oops! my bad, I should have said Red Tailed Shark. Do consider providing more hiding or resting areas,vegetables in their diet,and perhaps increased water movement or filtration. Also consider the sharks territorial tendencies. If your water tests consistently ..Zero ammonia, Zero Nitrites,and NitrAtes at twenty or below,, then nipping as stated ,could be the source of the problem. Many times we decorate or landscape the aquarium to please ourselves and while this is important,, We must also consider the fishes needs as well. If there are few places to explore,hide ,or rest,, the fish will all want to use what little is available and nipping would I think,, not be uncommon. Clown loaches are much like puppies in my view and are always exploring this area or that and may be the shark doesn't appreciate their antics especially after dark. As varied a diet as is possible will always result in healthier fish. Frequent small water changes when in doubt,maybe twice or three times a week will not hurt anything and is cheap insurance in regards to water quality. Much easier to change water than to treat for pathogens unknown. ICH would not necessarily be first indication that fish was ill.