Is my Penguin 150 mod ok?

[Chris1212]

20 gallon. I was treating for ich with meds so I got rid of the standard carbon cartridge. Replaced it with the below setup: bag of seachem matrix below two aqua clear sponges behind the biowheel that comes with the filter. Hoping this does the trick for bio and mechanical filtration. All working good except the sponges are now blue from the residual meds that were still in the water.

Is this the wrong setup? Should the matrix bag be on top of the sponges instead of below?

 

[seangee]

Your choice. Usually you have the sponge before the matrix so it removes the solid waste before going into the bio media. But since its a hang on filter it doesn't really matter as you probably rinse both weekly anyway. Personally I don't bother with bio media and just use sponge, very similar to what is in your pic.

 

[Chris1212]

Good to know. I'm hoping that by cramming two sponges in there, I can eventually remove one and use it for an instant cycle quarantine tank.