The algae will turn all kinds of different colors depending on type. I've had BBA turn bright red....then gray....then gone.
Is it an internal cannister or external? I have taken them apart in the past, set the media(sponges/pads, stars/noodles) aside in a tub of tank water, and once apart, I've taken all the plastic trays and scrubbed them thoroughly, as well as the insides of the cannister. Don't dip anything that you can't let sit in the tub of conditioned water afterward.
Return tubes, spray bars, siphon tubes can be dipped rinsed, and into the tap water conditioned water.
BTW, the picture you posted has the shape of an SAE, but looks much darker than an SAE. Could just be the picture.
Len
Is it an internal cannister or external? I have taken them apart in the past, set the media(sponges/pads, stars/noodles) aside in a tub of tank water, and once apart, I've taken all the plastic trays and scrubbed them thoroughly, as well as the insides of the cannister. Don't dip anything that you can't let sit in the tub of conditioned water afterward.
Return tubes, spray bars, siphon tubes can be dipped rinsed, and into the tap water conditioned water.
BTW, the picture you posted has the shape of an SAE, but looks much darker than an SAE. Could just be the picture.
Len