I currently make a product and i want to know if i am violating trademarks and if i can get my own trademark. Essentially I mix three popular trademarked fish foods together and then sell it as my own product under the idea that variety is best for your fish. I don't list the trademarked names of the other fish foods but most people could figure it out from the description. Is this legal and can i trademark the name that i am using to sell this product ?