Please let me know if this looks like fin rot, and if so should it be treated with Melafix?
I have had my tank running for several months and have the water tested regularly (all zero values and pH 7.4). It's a 65l tank with honey gouramis, corydoras, tetras and two newly added male guppies. The guppies were added yesterday and over the past 24 hours, one has developed what looks like fin rot. It looks like a cut in the middle of the tail which has gradually been getting larger. The other guppy is ok as are my other fish.
http/s492.photobucket.com/albums/rr282/fionah88/?action=view¤t=photo.jpg
http/s492.photobucket.com/albums/rr282/fionah88/?action=view¤t=IMG_0108.jpg
I have had my tank running for several months and have the water tested regularly (all zero values and pH 7.4). It's a 65l tank with honey gouramis, corydoras, tetras and two newly added male guppies. The guppies were added yesterday and over the past 24 hours, one has developed what looks like fin rot. It looks like a cut in the middle of the tail which has gradually been getting larger. The other guppy is ok as are my other fish.
http/s492.photobucket.com/albums/rr282/fionah88/?action=view¤t=photo.jpg
http/s492.photobucket.com/albums/rr282/fionah88/?action=view¤t=IMG_0108.jpg