Question 1

what are the dimentions of these filters?

Accepted Answer

1&1/2" dia X 2&1/2" high with a 1/2" hole part way through.

Question 2

Will these fit on a fluval 406 intake?

Accepted Answer

It's possible that they, technically, might fit, but the sponges themselves are not appropriate for that filter.  For the Fluval 406, you'll want a sponge that is MUCH larger.  On my Fluval 306, I use this one from Amazon:  Filter-Max III Prefilter by Aquarium Technology.  You can also find larger ones under "pre filters" on aquariumcoop.com.

Question 3

I have got guppies in my tank and am wondering if this will help stop them from getting stuck to the filter unit and dying?

Accepted Answer

This will definitely help, but your guppies are probably dying before they get stuck to the filter.

Question 4

Is this hollow or have sponge on one end? Will the water still be sucked up with my penguin filter?

Accepted Answer

It's a hollow cylinder, open at one end and closed on the other.  Water flow starts out good, but declines as the pores clog . I change sponges once a week, when flow slows down. When I clean the sponge under running water it holds an incredible amount of dirt. I would prefer the sponge be more open cell, to stop baby shrimp and fish from getting sucked up but allow dirt to enter the filter. but it catches all. Still, they are cheap enough that I use them until I find something better.

ASIN	B004K9A15G
ASIN	B004K9A15G
Best Sellers Rank	#161,421 in Pet Supplies ( See Top 100 in Pet Supplies ) #2,756 in Aquarium Filter Accessories
Brand Name	Zanyzap
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (2,026)
Date First Available	January 21, 2011
Item Weight	13.61 g
Item model number	FBA_FEDGE/3PK
Manufacturer	Zanyzap
Manufacturer	Zanyzap
Model Name	FBA_FEDGE/3PK
Number of Items	3
Package Quantity	1
Product Dimensions	5.1 x 3.1 x 1.5 inches; 0.48 ounces
UPC	015561113878 837654434703
Unit Count	3 Ounce

Pre-Filter Sponge 3 Pack for Fluval Edge Aquarium

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