HMF Video

[BallAquatics]

After reading Pauline's post about HMF in a planted tank, I was cruising Google to see what was out there about that specific type set-up.  This is NOT about HMF in planted tanks, but it does show some of the flexibility in setting one of these up, and it's a video from Angels Plus...

On this particular video, they use a pump instead of air to move the water.  They also talk about layering the foam material, and using it as a filter/tank divider combo.  I've used it like that in 75 gallon tanks with very good results.

Dennis

[PaulineMi]

Do you know what Steve is talking about when saying the different types of foam can  be layered? Why would the foam be layered...what does that method accomplish?

Edit...I found the answer.  Larger pores in the first layer traps debris.  The next smaller pored layer can remain cleaner and is the biologically active layer.

[Mugwump]

Do you know what Steve is talking about when saying the different types of foam can  be layered? Why would the foam be layered...what does that method accomplish?

Edit...I found the answer.  Larger pores in the first layer traps debris.  The next smaller pored layer can remain cleaner and is the biologically active layer.

Bingo.....JoAnn fabrics sells an untreated green foam the I've used for diy sponge filters and sponge 'slip overs' for the hob filter intakes....I believe it only comes in 4" thickness....but, it's very dense pored....

[Frank The Plumber]

You need to use the hydrogenated foam. The bacters eat the green foam. Jimmy Nobles was messing with this stuff, I think he has a decent source, we'll have to pick his brain at GCCA swap.

[Mugwump]

Cool, but I think we're talking a different green foam. I've used it, and it hasn't broken down at all. Rinses well,etc....non flame retardant, comes in any size you want...rougly 4" thick X 24"'s wide...cut to length...never heard of bacters eating foam.........or breaking it down