bio film

[finfayce]

hi
not sure if Bio film is correct term. it’s the cloudy film on the glass. - yes i need to do a cleaning. awhile back when i rehomed my guppies 5 fry were still in tank afterwards. so being a softy, i kept the stupid guppies. i put them in my rainbow darter tank. i feed the darters frozen food. while the cube dissolves, the guppies are eating it. they get their own flakes. ughh! can the film come from over feeding guppies? i think i will put the guppies in my big fantail goldfish tank. tough love stupid guppies. ( there are plants for them to hide)
sound cruel?

 

[Uberhoust]

Not entirely sure what your question is. But yes if you overfeed anything in your aquarium it can cause excessive growth of a number of different things you may or may not want to live in your tank. Likely you are getting an initial growth of algae on the tank. Without a better description or picture it is difficult to say more. I am not very familiar with any of your fish so I won't comment on that.