This is a picture from my old tank (picture will be below) i recently changed to a bigger tank and i did have to use some stuff from my old tank and noticed this coming back no where near as strong but it is coming back now i did clean the stuff from my old tank but it seems i didn't clean it good enough sadly now in my old tank it would be back in a week of cleaning it off and it came back just as strong yet in my new tank it took a week before even showing up but as i said above it's a lot less strong but i don't want it to come back as strong as it was in my old tank some more info its sticky and brown when i wiped it off so i did think about diatoms but i tested my water in my new tank and i don't seem to have any problems this might be why it came back less strong as i did have some problems in my old tank due to the old sand and some food getting stuck in certain places which i don't have any problems with now still i would like to figure out what it is to make sure it wont come back as strong and if there is something i can do now to kill it off before it takes over the tank any info or ideas are welcome



