Hi guys I have 1 betta fish in a 35L tank with a heater and filter all cycled, I’ve come across this oily film on the top of the water is this something I need to be concerned about ?



https://v.redd.it/lqov7y0mk3vd1

Posted by Professional-You3076

1 Comment

  1. Nah, it’s just biofilm. Add more surface agitation, something to actually break the surface to get rid of it.

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