can't wait for my crayfish to breed... how to encourage them to mating?

For the first few days everything seems normal, but later 1 has gone missing and I can't seems to find it in my heavily planted aquarium.

The other one start to hassle its tank mate like poso snails and oto. Then one day my daughter saw it was chewing on one of my oto... and poso snail which I got from our good sir Arrow here.

Its color also change from blue to brown. I have no choice but to remove it to a separate tank.
I really can't tell whether it is a real marmorkreb, just have to wait until it berries I guess.

Hope you can share some of your experience

nice... how you enhance their color especially those marmorkreb and red swamp? my red swamp look pale right now... molted a week ago

This is what they look like when first arrive.

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Then it becomes brown.

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hrm... water parameter? lighting? 

I do 1/2 water change 2 times a week... still waiting for them to berries... how to encourage them?

I see... what species of your crayfish that berries?

correct me if im wrong, marmokreb didn't require male to breed?

I want to try marmorkreb, can we mixed it together with red swamp?

they will do postage for live stock.
I have ordered few times in lelong which most of the seller is from northern states.

http://www.lelong.com.my/merchant/acestoryaquatic.htm (Got big inventory of live stock)
http://www.lelong.com.my/merchant/aquaticforever.htm (where shamn9 and I ordered marmorkrebs)

Btw I stay in Puchong. No casualty so far from all the shipments (finger crossed) 

red swamp?

I didnt keep crayfish for a very long time..but darn! this red is striking!!!

My clarkii's usually a bit darker red..unlike urs.. Stunning bro..stunnig!!

May i know what's poso?

me too... first planted tank, next marine, next shrimp tank, now crayfish... ah, please help me... easily got poisoned... hehehe...
plus breeding... successful with guppy, now crayfish... wish me luck guys... marmorkreb, here I come... 

the blue one is marmokrebs or electric blue?

wow... red claw become blue like that? how you take care of them? any advise? diet? light preference? environment... care to share with me... really jealous with your crayfish...