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So starting to actually get more CuC for my 2 tanks since my 125 is going fallow for about 3 months. I came across one of my remaining snails with what I can guess is a barnacle. Question is, based on research I find that they can be beneficial but can also be detrimental to a system if they get out of hand. Rather than get rid of it im keeping it, but as its just a single barnacle, do I need more than 1 to have a "outbreak"? Or is one gonna spread over time and then become a nuisance? Regarding that for a reef tank ( my 36g bow front reef ), would they harm/kill any soft corals or would they just attach to hard skeleton corals and be like a filter feeder among the coral ( i have hammers and soon to be some more acans/acros )?

Does anyone know what this is? It started growing on my live rock when I first got the rock. I’ve had the tank for around 2-3 months and it isn’t spreading a ton. Is it A majano anemone?

Need help id'ing these critters! Need to know what they are and if they're good or bad.

Hi all, I have a cleaner shrimp in my 30 gallon tank that seems to have a voracious appetite. I’m very happy with the small skunk cleaner and how much he tries to clean my fish. But counterintuitively, this makes me worried about my fish. I know my tank has ich since I had an outbreak in the past, but all my fish currently look and act healthy. No spots or scratching on rocks or any other unusual behavior. My largest fish, a foxface rabbitfish has been getting a lot of attention from the shrimp. The rabbitfish was also hit hardest by the ich in the past. It’s a small tank and I guess it’s not easy to avoid the manic little shrimp (the rabbitfish is moving to a bigger home soon), but the rabbitfish often swims slowly past. The shrimp jumps on and starts to clean and the rabbitfish shakes him off shortly after. Not sure if the fish is asking for it or not. Either way, my real question boils down to this: If my cleaner shrimp is cleaning my fish a lot does it mean my fish is getting sick? Even if the fish shows no signs of infection? thanks in advance to any thoughts and advice!

Hello, I wake up this morning with one of my chromis not swimming well : The tank is new of almost 1 month. Any idea what i could be and what i could do to save him ? Water parameter : Salinity : 1.025 Temperature : 25 Celcius Ammoniac : 0.25 (i put frozen food 20min before so maybe a false reading) Nitrate : Near 0 Phosphat : Near 0