Why my guppies always lose some ..

Brief：
Why my guppies always lose some part of their tail fin? Water problem (PH too high) or coz of fighting or any other reason?Answers: Test your PH first.. 

Why my guppies always lose some part of their tail fin? Water problem (PH too high) or coz of fighting or any other reason?

Test your PH first, it should be around a nice comfy 6.8-7.0 test kits are at any petstore. Also watch your fish for a while, see if there is any aggression. Sometimes they like to nip at each others tails when they are being defensive.

And purchasing medicine for fins such as melafix should help the fins regrow nicer and quicker. someone is nipping their fins. If you have other types of fish in with them watch for awhile. If not, the water quality could be the problem. More likely being nipped. bite each other sometimes , that's how they play probably fin rot. make sure that your water parameters are in check.

for any more help please go to www.forums.petlovers.com in the fish section bettachris is more than willing to help anybody with fish questions. bitten by their own kind(don't worry they will grow back) You answered your own question it is due to fighting I used to breed guppies but I soon gave up I also had A variety of tetras in with them But the guppies killed them Including a Gourami which was twice there size it is uncommon for tetras to fight but they do I also have a gourami in a fish tank with a fire Oscar and it has done extremely well considering that you cant mix Cichlads and tetras together as ciclads are known to be aggressive I have 4 guppies and 4 tetra fish and they all nip each others tails.i looked it up it says its a way of playing.but could be a way of fighting..i have had my fish for over a year and they are all missing some taol fins. lol