Reddit mentions of Jardin Aquarium Fish Tank Stone Sponge Filter

For the far side, a few options:

1. tiny power filter https://www.amazon.com/Deep-Blue-Professional-ADB88700-Aquarium/dp/B00BUFTI6Q/ref=sr_1_1?ie=UTF8&qid=1467385633&sr=8-1&keywords=deep+blue+professional+filter (lfs guy has these on his mini shrimp tanks)
   
   
2. sponge filter: https://www.amazon.com/Bacto-surge-Foam-Filter-Large/dp/B00GOFPX9I/ref=sr_1_2?ie=UTF8&qid=1467385683&sr=8-2&keywords=sponge+filter
   
   
3. another sponge filter option: https://www.amazon.com/XinYou-Aquarium-Biochemical-Sponge-XY-2821/dp/B009V3UGDS/ref=sr_1_8?ie=UTF8&qid=1467385683&sr=8-8&keywords=sponge+filter
   
   
4. the wildcard (interesting product, no experience with it) https://www.amazon.com/Hydrodynamic-Perfecto-Marineland-Aquarium-Filtration/dp/B01BI02JMC/ref=lp_13691185011_1_2?srs=13691185011&ie=UTF8&qid=1467385743&sr=8-2
   
   
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   for the middle one: https://www.amazon.com/Jardin-Aquarium-Stone-Sponge-Filter/dp/B008FLWY5U/ref=sr_1_29?ie=UTF8&qid=1467385522&sr=8-29&keywords=sponge+filter+jardin
   
   should be more than enough, get the 99c control valves or a 'hub' to dial in the airflow to each. (cheapest in box stores or walmart)