Yeah............ I really don't think there should be any problem, as long as you clean the inside well...
If people can use dark colored rubbermaid containers as a pond filter,.. I am sure a clear one will do well for a tank,...., because Marineland sumps,.. I believe,... is made of plastic...
(sorry for the ...)
Rena FilStar xP3, Aquarium Systems Visi-Therm 200W (2), Coralife 48" Aqualight 260W 6700K
10 Gallon Hexagon
Hagen AquaClear 30, Visi-Therm Deluxe 50, DIY CF 20W 6500K CF, Hagen Natural CO2 System :: Bloodfin Tetra (1), Red-eye Tetra (3), Black Skirt Tetra (3), Harlequin Rasbora (6), Platy (1), Otocinclus Catfish (1) :: Rotala Indica, Hygrophila Difformis (Wisteria), Cabomba Carolinia