Seio 820 (Missing external casing, still works perfectly fine without it) $20
Seio 620 $10
Koralia Nano $12
Koralia 1 $15
Koralia 2 $20
Koralia 2 (Cap seems a little loose) $15
Coralife Nano Protein Skimmer (in-tank, for nanos) $30
http://www.amazon.com/AquaticLife-Internal-Mini-Protein-Skimmer/dp/B001V95TZA
Seio 620 $10
Koralia Nano $12
Koralia 1 $15
Koralia 2 $20
Koralia 2 (Cap seems a little loose) $15
Coralife Nano Protein Skimmer (in-tank, for nanos) $30
http://www.amazon.com/AquaticLife-Internal-Mini-Protein-Skimmer/dp/B001V95TZA