Marina Bio Clear Ceramic Replacement Cartridge for Slim Filters, 3 Pack – Optimal Filtration for a Healthy Aquarium,White

Great filter for my aquarium - works well at keeping the tank clean

GREAT!! I install these monthly and it clears up my guppy water after a week! i WAS expecting it to clear up immediately, but that does not happen with fish filters, i supposed. Anyways, it is very good, cheap, and easy to install. simply open the lid, take out with the old, put in with the new. Thank you Marina!

When I was a kid, I had to go through a long process of using a filter pad, rinsed charcoal and filter fiber to change my filter. It made having a fish tank a real chore. I know that this filter technology is standard now, but replacing one of these every two weeks is cheap, easy and effective! I can change the water and filter of my 10 gallon tank in 10 minutes without rushing. My fish and I are happy.

It's good quality. The only reason I take one star down because they didn't specify for planted tanks. For planted tank you don't need zeolite. Indeed, zeolite will absorb the nutrients that the plants need, so now I have a bunch just laying at home that I don't use. Basically, if you have planted tank, don't buy this product.

I purchase these filters in a regular basis. Easy to install, work great and keep the water clean for 3-4 weeks. Fits perfectly and you have to make sure the writing SIDE A always facing towards you when replacing the filters.

Very easy to use.

I got exactly what i asked for and at a good price. till i find a better deal. I will be buy from here!!! FYI if your trying to cycle a fresh water aquarium add like 2-3 crushed pees per 10 gallon. helped cycle my tank. I think it helps the good bacteria grow.

These Slim Filter Cartridges are so easy to replace. So affordable. I have a 10 gallon tank and change out at least 2 every 2 weeks. My pump/filter has the 3 compartments so I need 3 cartridges. I prefer to leave in one cartridge for the "good" bacteria. These are much easier than trying to make your own media. I recommend them.

Couldn’t get these in any store for my generic hang on back from Amazon so happy when I found them, I just kept reordering over & over. Size was perfect. Water quality almost immediately improved & they were so cheap in comparison to other hang on back filters. Durable, long lasting & easy to clean until end of life was near. Easy to use also: take out of packet and rinse then insert. Sadly I have those fish away & retired the tank & filter but it was a good ride. The HOB & filter media’s gave me a good service. Defo recommend these.

Perfectos para mantener mi acuario en óptimas condiciones. Son caros pero se pueden reutilizar lavándolos con el agua del acuario que vayas cambiando, para mantener las bacterias y nutrientes. Pongo dos de estos y otro que compré a la vez en mi filtro de cascada

Excellent filter which last a very long time up to 2 months. Crystal clear water and my fishes are healthy and happy.

Super buen producto, filtra bien el agua. Y dura mucho tiempo.

Va bastante bien filtran para pecera de no más de 20litros.