I also have heard lava rock works well too which you can buy at your local
hardware store in large bags for use in barbecues and stuff....the holes in
the surface allows more surface area for the algae to grow on.  More surface
area = more algae for better filtering.
My two cents.
Hope this helps!
Take care!
Craig
Ontario, Canada

Moose wrote:

> When making a trickle filter and sump for a series of freshwater tanks,
> what is the best algae growing medium, and what will be good enough? I've
> looked at bioballs, but they're really expensive. I've heard lego
> suggested, or nylon netting bunched up. Today at a LFS one of the staff
> suggested that I use filter inserts (just the big white fuzzy things).
>
> Any noted advantages or disadvantages to any of these?
> Will bioballs really contribute to amonia and nitrate spikes?
> Anything else I should take into consideration?
> TIA
---
þ RIMEGate(tm)/RGXPost V1.14 at BBSWORLD * Info{at}bbsworld.com

---
 * RIMEGate(tm)V10.2áÿ* RelayNet(tm) NNTP Gateway * MoonDog BBS
 * RgateImp.MoonDog.BBS at 1/4/03 2:04:41 PM