How to Control Hydroids?

Administering a regimen of fenbendazole (FBZ) or Panacur will eradicate any hydroids, Aiptasia rock anemones, or bristleworms from live rock or live sand, thereby rendering them completely seahorse safe. The recommended dose is 1/8 teaspoon of the horse dewormer granules (22.2% fenbendazole) per 10 gallons of water.

How do I get rid of hydroids?

I've found that cutting off their food supply can help. Get a leopard wrasse, something that will have a major impact on micro crustaceans.. Hydroids consume copepods and other micro crustaceans. Cut back on feeding, and knock the population of 'pods down, and they'll start to fade.

What will eat hydroids?

The lynx nudibranch (Phidiana lynceus) - Only eats hydroids, especially fond of Myrionema amboinense. Sea Urchin Salmacis bicolor- Good eater of Myrionema.