I was cleaning my filstar filter today and when i connected the hoses back up and turned the pummp on a but load stuff came out of the spray bar. Its some kind of build-up or film from inside the rubber tubing. i was just wondering what this junk was made of mostly. it is white and very thin. i mean a crap load of this junk came out. it completly littered my tank.i turned the filter and skimmer on high and tried to fish out as much a possible. i had to leave like 10 minutes after it happend but when i got home everything seems to be ok. havent run lots of test yet but nothings dead.