First, they like a lot of light. I raise them well high up under a 10,000k metal halide.
It's useful to understand that these corals CAN catch habits from each other.
If you put two frogs or two hammers touching each other, they don't mind---for a while.
If you put a frog touching a hammer, they will get along fine for a while, then start lengthening and strengthening the tentacles that are in contact.
You may also find the frog developing tentacles that look like hammer.
You may find hammer tentacles developing extra branches like frogspawn, on the same head with regular hammer.
But the two colonies will increasingly not like each other.
Putting either in contact with torch will get one hyper-aggressive torch and nobody will be happy. Torch defends itself.
The sting of frog and hammer is mild by comparison to other corals, including torch, but it damages the coral to have to sting: wear exam gloves. Rubberband the wrist if you have a cut finger. People get cavalier about touching these, but in this case, macho can bite you: wear the gloves. LFS owners who have to handle this stuff a lot may come down with coral allergy, which means they react just to the water these corals are in. Don't go there. Wear gloves from the start, so you WON"T have a problem---and your corals will be happier, too.
They are all euphyllias. Euphyllias have a normal reach of about 3" as far as annoying their neighbors---unless it's another euphyllia, or something they really don't like. In that case, you may find the tentacles on that side growing super thick and long, about 4".
Also, if a euphyllia 'pops' a head and you find it loose on the sand, put it in a shallow glass dish on the sand, in the light, so it won't blow under the rockwork, and supply plenty of calcium for your tank (minimum 420) and it will start growing a new skeleton.
The vacated skeleton back on the old coral will not likely grow a new head.
It's useful to understand that these corals CAN catch habits from each other.
If you put two frogs or two hammers touching each other, they don't mind---for a while.
If you put a frog touching a hammer, they will get along fine for a while, then start lengthening and strengthening the tentacles that are in contact.
You may also find the frog developing tentacles that look like hammer.
You may find hammer tentacles developing extra branches like frogspawn, on the same head with regular hammer.
But the two colonies will increasingly not like each other.
Putting either in contact with torch will get one hyper-aggressive torch and nobody will be happy. Torch defends itself.
The sting of frog and hammer is mild by comparison to other corals, including torch, but it damages the coral to have to sting: wear exam gloves. Rubberband the wrist if you have a cut finger. People get cavalier about touching these, but in this case, macho can bite you: wear the gloves. LFS owners who have to handle this stuff a lot may come down with coral allergy, which means they react just to the water these corals are in. Don't go there. Wear gloves from the start, so you WON"T have a problem---and your corals will be happier, too.
They are all euphyllias. Euphyllias have a normal reach of about 3" as far as annoying their neighbors---unless it's another euphyllia, or something they really don't like. In that case, you may find the tentacles on that side growing super thick and long, about 4".
Also, if a euphyllia 'pops' a head and you find it loose on the sand, put it in a shallow glass dish on the sand, in the light, so it won't blow under the rockwork, and supply plenty of calcium for your tank (minimum 420) and it will start growing a new skeleton.
The vacated skeleton back on the old coral will not likely grow a new head.
