Step
1
Check the FAQ
The FAQ might have what you need.
Step
2
Do a bit of reading.
Read protocols for biological sand
filters.
Download the detailed JAL filter manual to help get
you started.
Step
3
Send us an email.
Looked everywhere, still can’t find the answer, send us an email.
Step
4
Can’t get enough.
Join the community, follow us on Twitter, Facebook.