No
Normal rocks are not healthy for gold fish. Although you can use them as long as you clean the rocks before you put them in your fish tank. There are lots of harmful things on rocks that can get your fish really sick, if you have expensive fish your best bet is to use the rocks that you get from your local fish store. I had some of the same type of fish you had and i did not listen to someone telling me the same thing I'm telling you and all of my fish died i would not want the same thing happening to you. I wish you luck on your fish tank
No! marine fish are salt water fish and tropicals are fresh water fish, this cannot be changed.
no
no its not okay
No, clown fish are marine fish and tetra and guppies are freshwater fish.
small ones
it's not unusual for a fish to play with his rocks.
You can purchase white aquarium rocks for your fish tank at pet stores, aquarium supply stores, or online retailers that specialize in aquarium supplies.
One can purchase a fish tank heater at various pet supplies shops. PetSmart, Petco, Marine Land, and Argos all have fish tank heaters for sale on their websites.
Are there any other noticeable problems from this? Some fish are just goofy.
Blow fish (Puffer Fish) are tropical, brackish or saltwater fish. Usually found in the more salty parts of estuaries. In captivity they are regarded and treated as "Marine Fish". Setting up a marine tank is a very complicated business and involves the use of technical equipment like Protein Skimmers, Ozoneizers and the like. Maybe you should ask your question in the marine section.
if you don't have a fish tank,try a small tank with plants and rocks for it to climb on .The size of the bowl depends on the size of your frog