What do you use for caves for large pike

[wild bill]

We have what we believe are a pair of lugubris pike. My question is what do I need for a cave to get them to breed. Now I know this is hard to do but these 2 seem very cumfy in the tank it is a 200 gallon 4x4 tank. Any advice on substrate water movment and cave structure will help. The set up is filtered by a fx5 and 30 gallon sump system with a powerhead in the tank to increase current.

 

[wild bill]

I checked around and it sounds like all pike have siular mating habits. What I need to know is do they prefer natural caves or will pipe work.

 

[Decker504]

I use everything from pvc, large porous clay pots, to large natral driftwood. I even found a clay pot called a "frog hut" which is about 12in in diameter, dome shaped w/ a little opend for the frogs, which in my case are frog faced pikes...