Algae? that won't scrape off that easily
I have a tank with your typical green/brown algae growing on the walls. This alge come off very easily with my mag float scrapper.
However, there are area of dark green/brown clusters of circles on the walls that will not scrub off with the mag float. Can anyone tall me what this is? Again, they are small circles that are usually in clusters. I can't tell yet if my snail will eat them.
450g Acrylic FOWLR
380 lbs. of Live Rock
1 Yellow Tang, 1 Mono, 1 Blue Angel, 1 Foxface Lo, 1 Lunare Wrasse, 1 Snowflake Eel
1x Dolphin AS2100
1x Dolphin AM4700
72" Aqualight Pro: 4x96 Actinic, 3x150 HQI Halides, 4x1 moonlights
AquaC EV-1000 Protein Skimmer run by Dolphin AS2100
AquaUV 114 watt UV Sterilizer
2x Jager 250w
...Work in progess.....