Jul 30, 2020 #1 M mrjohnreed Active Member View Badges Joined Aug 25, 2015 Messages 103 Reaction score 55 Rating - 0% 0 0 0 can anyone tell me what this white stuff is on my red macro as well as on my heater? Thank you.
Jul 30, 2020 #2 vetteguy53081 Well known Member and monster tank lover View Badges Partner Member 2024 Excellence Award Reef Tank 365 RGB Article Contributor Tampa Bay Reef Keepers West Palm Beach Reefer Hospitality Award Ocala Reef Club Member 305 Reef Club Wisco Reefers Midwest Reefer Fish Medic MAC of SW Florida Rock Pool Reef Keepers R2R Secret Santa 2023 My Tank Thread My Aquarium Showcase Joined Aug 11, 2013 Messages 96,707 Reaction score 215,505 Location Wisconsin - Rating - 100% 15 0 0 Poriferan sponge. can be invasive. Cut/brush away as much as you can