Food For Farlowella

This may be a little off topic, but I'll post it anyway since it is 
related to PMDD use:

Since I started using my version of PMDD's about 2 months ago, I 
have had a significant reduction in algae growth (and concurrent 
increase in plant growth.)  Now I have a Farlowella that looks like 
it is going hungry.  Its health seems good, it remains active but 
is getting thin.

Any suggestions on what I could feed it - I prefer not growing 
algae again even though I had previous success at doing so.  

Doug Skokna in warm, sunny Houston, TX