If by "clam" you mean a fresh water "Byvalve molusc" such as a Mussel. then yes they could both cohabit. But remember that the shellfish requires the same ratio of water as the fish too. So it would be reducing the amount of Oxygen available to the Betta. The base rule still applies. 1 inch of fish requires a minimum of 1 gallon of water.
you can put a betta in a 54 gallon tank
No they cannot, also if you put two Betta fish together, they will fight.
Do not put any sharp angular things in the tank and do not put another type of fish in your betta's tank.
put it in a tank with another male betta
THey will most likely have eggs. Be careful. You might want to put a divider in the tank.
Provided the tank is large enough and the catfish is a tropical species there should be no problems.
you can put a betta in a 5 gallon tank
It is generally not recommended to house two betta fish together, even if they appear to get along. Male bettas can be aggressive towards each other, leading to fights or stress. It's best to keep them in separate tanks to ensure their well-being.
It depends on the type/brand of conditioner, and how much water is the Betta tank can hold.
The eggs will be in the tank and if the dad's in the tank take the mom out.If the dad isn't in the tank take the mom out and put the dad in.
Yes you can put a Betta and bottom feeders together in the same tank. I have two Chinese algae eaters and one male Betta in a 5gl tank and no one bothers each other. The bottom feeders need plants (preferable LIVE) and rocks or something they can hide under and sleep in themselves. I also have a Betta hammock (fake leave with a suction cup to attache to the side of the tank) that you can get at any pet store. My male Betta loves the hammock! One bottom feeder lives in a live plant and the other bottom feeder lives under a rock.
they can eat guppies and betta fish the betta fish will put up a fight sometimes they wont eat the fish and just leave the fish there for a tank mate if there is any amount in a tank together but if you put to many big turtles in a tank with little turtles the big ones will eat it