Hi everyone, I'm new to the group although I've been dipping in and out of Reef2reef for advice since we set up our first tank in 2017. Started with a Fluval M40, then moved to a Reefer 350, and more recently (March 2022) downsized to a Reefer 170 due to a house move. At present the tank isn't looking too great as we're battling GHA and cyano. Hopefully we'll manage to get on top of both