I have not had any issue with Giganteas capturing and eating fish or snails. My favorite type of clown is the plain old True Percula and giganteas are their natural host. This makes it easy for me since giganteas do not move as much as other anemones. They do get very large though.
I have had other types of anemones in the past and my experiment which each is either they move too often or they eat snails. Giganteas are the only anemones that I will keep in a reef tank.
Red Haddoni: Beautiful and once found a happy spot, it stays put. However, it's a snails eating machine. I did not have any issue with fish, but every week or so, I see a snail shell being spit out. Under its pedal is a snails graveyard.
RBTA: I love this simple and hardy anemone. However, no one seems to know how to make it bubble as the name suggest. It will be bubbled when first introduce to the tank. After it's comfy, all the tentacles will be elongated. Move around the tank for no reason and can be prolific with their splitting.
Sabae: Nice anemone when it's white(bleach), once comfy, it turns into an ugly grey color. Natural host for Maroon clowns but Maroons get too aggressive.
Magnifica: I'm 50/50 on this one. Some day I like it, some day I don't. Hard to find a place to settle. One crawl into my overflow and overflow the tank. Makes the black on Percula Clown turns gray.
I have had other types of anemones in the past and my experiment which each is either they move too often or they eat snails. Giganteas are the only anemones that I will keep in a reef tank.
Red Haddoni: Beautiful and once found a happy spot, it stays put. However, it's a snails eating machine. I did not have any issue with fish, but every week or so, I see a snail shell being spit out. Under its pedal is a snails graveyard.
RBTA: I love this simple and hardy anemone. However, no one seems to know how to make it bubble as the name suggest. It will be bubbled when first introduce to the tank. After it's comfy, all the tentacles will be elongated. Move around the tank for no reason and can be prolific with their splitting.
Sabae: Nice anemone when it's white(bleach), once comfy, it turns into an ugly grey color. Natural host for Maroon clowns but Maroons get too aggressive.
Magnifica: I'm 50/50 on this one. Some day I like it, some day I don't. Hard to find a place to settle. One crawl into my overflow and overflow the tank. Makes the black on Percula Clown turns gray.