Rep. Thad Altman, R-Rockledge, filed a House bill Friday to match a controversial $2.4 billion proposal — backed by Senate President Joe Negron — to buy farmland south of Lake Okeechobee. The aim of the bill (HB 761) is to prevent the return of toxic algae blooms in Treasure Coast waterways, just south of Altman’s district. Sponsored ContentCIR Agriculture Harvester …