I already had the sprung book on algae so I actually only ordered the little paperback Marine Algae Control Secrets to get free shipping but it has some interesting info!

Like for example even though I always washed my arms really well (no detergent), sometimes used should lengths gloves, etc. after every big caulerpa trim job I felt my LPS seemed hurting and now I learned that caulerpa has something called Caulerpicin and it's a toxin that can hurt coral growth and even harm some fishes!

Also read some cool stuff about cyano, bryopsis and others and will post when I have more time.