purple oils substance

[Dave1993]

so i was filling my tank up with RO water and noticed this purple oily stuff on top of the water it looked like this

not as much should i be worried no fish in as i have not even mixed the salt in yet any ideas what it could have been off? it has gone now it was only there for like 5 seconds when i put the water in

 

[One Reefing Boi]

so i was filling my tank up with RO water and noticed this purple oily stuff on top of the water it looked like this

not as much should i be worried no fish in as i have not even mixed the salt in yet any ideas what it could have been off? it has gone now it was only there for like 5 seconds when i put the water in

just film on the surface of the water -- no issues. When you poured the water in it disturbed the top of the water and broke it up. On a running tank you wouldn't notice it because the returns will be agitating the surface of the water preventing it from building up. What is the plants in the tank?

 

[Dave1993]

nono thats not my tank my tank is completely empty that was just a example of what it looked like

 

[Dave1993]

that's why i thought it was weird cause nothing atall is in my tank

 

[Billdogg]

Did you rinse the tank well before filling it? If it's a new tank it is probably residue from the manufacturing process. If it's a used tank, biofilm of one sort or another. Either way, a good cleaning will take care of it.