Aqua One - Maxi Internal Filter 102F Aqua-Pics Algae Starver is a

Aqua-Pics Algae Starver is a concentrated algae control solution available in both Marine and Pond Varieties

The Penn Plax Penn Plax Undergravel Filter combines the function of a traditional filter while offering maximum viewing since it’s hidden out of sight

Do not overload beyond the recommended weight capacity

Furthermore

Aqua One - Maxi Internal Filter 102F Aqua-Pics Algae Starver is aProven reliability and silent running Completely submersible sealed motor, economical to run Provides mechanical and biological filtration with high quality foam as media Built in venturi aeration nozzle Complete with suction cups for fixing to the side of the aquarium 1. 8m cable 2 + 1 Year Guarantee