This is a small pump I bought on Ebay but it is also available on Amazon. Links below.
Solar powered water pump (Ebay): https://ebay.us/U7ofCD
Solar powered water pump (Amazon): https://geni.us/M22pjdB
The pump is the 200 lph / 1.5W version.
The video about the hydroponic system mentioned in this video can be found on my Thousand Yard Stare channel here:    • New Solar powered Hydroponics System  
Link to a filter made using this pump perfect for wildlife ponds:    • DIY Wildlife Pond Filter  Solar Powered  
Some of the links above may be to my affiliate programs on Amazon and Ebay so they will throw a few pennies my way if you make a purchase it costs you nothing extra and helps towards keeping the lights on in my bunker.