New with crayfish

So, these are my crayfishes, Miss Orange and Mister Blue. I gonna tell the whole history resumed. First I had Miss Orange, and she was living alone in that fish tank for 1 month. Then I decided to buy a male, Mister Blue, at that time he was half of her size. So, one night he molt and she almost kill him, he lost his to big claws. But, regardless that he continued molting ( 3 times more) and she molted 2 time before I bought him. The thing is that they haven't molt in a while and I worry about it. About their relationship right now, after fightings she lost and he started to lived in the barrels and she in the small cave, but as you can see they are slowly getting along, and practically living together in the barrels or just walking around. The thing is that they haven't molt yet, and the female has now like dark stain that it wasn't there before the male's victory. Did she get rotten shell or Blue did something to her?
Also, how much have to feed him per day? I am throwing 3 of the green ones and 2 of the Orange one.
Sorry for the big essay and thanks in advance.

 

What size tank? And what are your water parameters? (Ammonia, nitrite, nitrate) also what’s your gh and kh? Crayfish are usually aggressive so I kind of doubt they will get along

 

Tank: 20 Gallons
pH: 7.0
Amonia: 0
Nitrite: 0
Nitrate: 10
Gh: ?
Kh: ?
What meter do I need to measure those two?
Also, Do you know something about the stain?
One is female and other one is male. How can I reproduce them?

 

The pet stores usually sell electric blues that are Procambarus alleni and orange that are Procambarus clarkii, so they will not be able to breed. I am not sure about the dark spot, but it doesn’t look like anything concerning.

 

The pet stores usually sell electric blues that are Procambarus alleni and orange that are Procambarus clarkii, so they will not be able to breed. I am not sure about the dark spot, but it doesn’t look like anything concerning.

Is that a possibility or you are you that they are different species. If that so, can you teach me how can I identify them?

 

Is that a possibility or you are you that they are different species. If that so, can you teach me how can I identify them?

If you purchased them from Petco, they are 100% the two species I mentioned above. If not, it is still extremely likely that that is the case. P. clarkii will have noticeably bumpier claws and the areola lines on the carapace touch. P. alleni’s areola has a gap (lines don’t touch) and the claws are usually narrower than on P. clarkii.

 

Tank: 20 Gallons
pH: 7.0
Amonia: 0
Nitrite: 0
Nitrate: 10
Gh: ?
Kh: ?
What meter do I need to measure those two?
Also, Do you know something about the stain?
One is female and other one is male. How can I reproduce them?

Stain is normal. If you want to breed them, you'll need a sponge to cover your filter intake so the eggs don't get sucked into it, or sucked onto it.

They need their own "cave" or den. That's where they'll spend most of their time, poop and leave remains of their prey.

Water should be on the harder side, if there's not enough calcium in the water they will die while trying to molt.

I had an electric blue crayfish for 3 years. You can also be pretty liberal with the aquarium salt. I fed my crayfish mostly live prey, fish, shrimp, other cray fish lol. Was cool watching him hunt.

 

You see what

Stain is normal. If you want to breed them, you'll need a sponge to cover your filter intake so the eggs don't get sucked into it, or sucked onto it.

They need their own "cave" or den. That's where they'll spend most of their time, poop and leave remains of their prey.

Water should be on the harder side, if there's not enough calcium in the water they will die while trying to molt.

I had an electric blue crayfish for 3 years. You can also be pretty liberal with the aquarium salt. I fed my crayfish mostly live prey, fish, shrimp, other cray fish lol. Was cool watching him hunt.

Could you show of you crayfish pls. I want to see how big it is.

 

You see what

Could you show of you crayfish pls. I want to see how big it is.

It died a year later and that was in 2017. Sadly I do not have any pictures, because I got it from a friemd and it was already old and he didn't want it anymore and it was my first tank. I'm purely a crustacean enthusiast, but my friend who gave it to me did say it lived longer in my care than it would have anywhere else. I love crustaceans and arthropods. After the adopted crayfish died, I got red claw crabs, in the end, I had one red claw left (he murdered all of the others but that one lived up until a year ago. 1-2 years past his life expectancy.

Just gotta trust what I say, or seek answers else where. But I did have an established tank fully cycled and brackish water before I had it. I still look for advice for crustaceans in freshwater/brackish, but no one has a crustacian based tank like I do. I don't like fish, fish are only there to be food for my crabs or entertain guests with their activity.

(FYI, a crayfish will live longer if it has a den/cave to hide in 'it will be less stressed' it'll live longer, but it will also devour everything in your tank, they're excellent predators and hunters and nocturnal) message me if you have any questions. I watched my crayfish day and night.