I HAVE A REDTAIL CAT THAT IS ABOUT TEN INCHES AND A FEW DAYS AGO I NOTICED IT HAD SOME GILL CUR ON ITS LEFT GILL SO I DID A WATER CHANGE OF ABOUT 30 PERCENT AND I ADDED ANOTHER FILTER ON MY TANK AND THE NEXT DAY I ALSO DID ANOTHER WATER CHANGE IT'S BEEN ABOUT 4 DAYS NOW AND MY RETAIL STILL HAS GILL CURL I WAS WONDERING IF ANBODY COULD TELL ME IF IT WILL STAY LIKE THAT OR HOW LONG IT WILL TAKE TO GO AWAY BECAUSE EVEN THOUGH THE WATER HAS IMPROVED SUBSTANTIALY I HAVEN'T NOTICED ANY CHANGE IN THE GILL CURL