can any one help me this evening one of my fish was swimming around pooping. the poop was 5-6" long and he kept brushing his under belly against the sand and ornaments i guessed to dislodge the poop. he has been swimming & eating fine i was able 2 get a closer look & it didnt look like regular poop. it was like a poop caseing like "chitlins" can anyone tell me what it couldb. am i 2 b worried? & what type of testing equipment do i need on hand for the water?