Just think of the horrible life those two little RTC's are in for. The odds of them ever having an owner half as knowledgeable as yourself is slim to none. They will probably end up in a newly set up huge 55 gallon tank with ammonia levels through the roof and a PH of about 4. Their whiskers will shrivel up and fall off and their gills will curl from the battery acid they must live in. If and when they live to see 12" they will be brought back to petco for a $1.25 credit and then and only then will they die a truly horrible death.
So about those RTC's ?????? I suggest you buy the pair of them, Its just the right thing to do
PS............ Thats what I tell myself every time I buy a new monster cat
Good luck..........
bob