Marina (3 of Each) Slim Filter Carbon Plus Ceramic Cartridges and Zeolite Plus Ceramic Cartridges

work great

Super crystal clear water when I use one of each. Never have any issues with the water quality in my fish tank.

This is the first time weve used these filters and if they were not going to work we were going to give the fish away and be done with the aquarium however the filters work like magic!

Exactly what I needed! Good value.

As advertised

This is the product we absolutely need for our aquarium and the price is good on Amazon. Having it delivered is one of the bonuses because we have to travel quite a distance to the first store that carries them.

Excelente

Refills for the slim 20 filter, new set up and the 4 filters seem very efficient, fast water clearing and now maintaining a good water quality. Very satisfied. Nice to get an very quick and early delivery. Thanks.

Easy to replace, works for 2 weeks then needs replacement. Works well

My local fish store was selling one pack of 3 for $12 and I paid two packs of 3 for $6 so I think I won (sad i didn’t support a local business tho)