WhiteDevil
Aquarium Advice Addict
Side fin makes them swim circles.
Possibly.
Possibly.
Thats not being disputed, im saying for the health of his fish since they are captive and have been captive for quite some time, by the time the crays are ready to be fed to his fish their systems will be cleaned out of the crud in the creek and rocks.
He still has to clean and test the rocks before he puts em in the tank, those rocks harbor alot of bacteria and larvae that his captives wont be used to and can kill his captives off if they hitch on a craw or feed fish and get into his captive tank. Most wont be harmful but it can be.
Im more concerned with what is going to be introduced to that 55 if he gets water bed rocks and just tossed em in with the feeder tank.
I must have missed the part where he was going to feed these to his fish. As far as hitchhikers, you can boil your rocks. That's generally advisable anyway. You shouldn't be getting anything terribly chemically reactive if you take it from a stream bed though.
Actually that all depends on his demographics, the midwest is loaded with limestone, pretty much all we really got under our feet unless you go to a materials dump or a quarry. This is just speaking from my area and what Ive been dealing with.
The Fox river is my backyard in northeastern illinois
Ok, thats up to you. I just try and keep the foods as natural as possible with captive game fish. I had a fry LM I got in a dip net a few years ago, he was 4 pounds when we re-released him under control of the IDNR back to the river.
They grow so fast with the right foods.
But we were talking about your rocks and how to clean them. if your craw tank is a creek tank, then go grab some and toss em in.