This is agreat product for Hydra treatment
Genchem No Planaria Shrimp Safe Planaria Hydra Killer Shrimp Fish Planted Tank
Had hydra break out a few treatments with this..... BOOM! No more hydra. Used while fish were in (orand and ryukin) tgey werr perfectly fine 100% water and filter clean and tge tank never looked soooooo goooood. Bit high in the price but it works, fast delivery . Thanks all at micro aquatic shop.
Genchem no planaria
excellent price and service thanks