The advanced TetraTec APS 100 Air pump is for use with all aquaria from 50 to 100 litres in size. With the external flow control valve included, the TetraTec APS 100 can be easily adjusted to provide the right air flow for all purposes like box filters, airstones, action ornaments and undergravel filters.https://www.aquaristikshop.com/aquaristic/TetraTec-APS-100/118090/
- Terry S. wrote about TetraTec APS 100 in 2016:
This is a good looking and quite pump. I am using it for brine shrimp hatcheries. Great value for money and very reliable.