I have several of them in use. Many of my friends use the filters in their small cubes and are thrilled to recommend him gladly. What you should know, however: The accessory kit sponge is too large pores for shrimp attitude. You can replace it with a shrimp safe sponge. I prefer the Sera Replacement sponge for L150-300. The filter current can be throttled. There is a sliding lever on the front.
