January 14, 2012
I have used the Penn-plax smallworld filters in smal tanks and fish bowls for some time. They do a very good job of filtering these small tanks. I am glad that I could find some place to contonue getting them.
ProsI like their size and efficiency,
ConsThe suction cups tend to deteriorate over time and I cannot find replacement cups for them thus causing the need to buy new filters from time to time.