@Iclazion: won't the enclosure (huge plastic tub) melt or something go wrong if the heatpad is under it?

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If I may answer,no it wont, Heating pads don't get out enough to melt the plastic, and if it is under the heat pad in not directly on the plastic, as most bins have like a honey comb or square section under the bin.

I have my containers in front of Heating panel about 15cm away and nothing has happened,

They are being kept in a 50cmx35cm black plastic tub ,ventilation is good ,the roaches are all adults (more females then males ),I think there are less then 20 roaches in there ,as for the dry food I use oats ,high qaulity persian cat food ,pronutro and pellet fish food ,

Find the females, see if they are gravid.

If they not breeding then that means they are not happy in there container.

Clean there tub out of all dry food. put the egg trays back.
Them
Take some leaves from the garden put them into some water to soak take hand full let excess water drip off and add on side of the container. (not to wet or the container will be to wet for them) Maybe put leaves on a egg tray laying flat so it soak some of the water.
Then get some greens, beans, pumpkin, bitternut, carrots, peanutbutter, cooked rice any vegetables and feed your roaches on that instead of so much dried food.
And start feeding them the cheaper cat food.

Also take 5 females and 3 males and put them into a container with substrate in and feed the same and see what happens.
Also might not be warm enough for them.

@cascade how do I tell if they are gravid? they do look kind of plump ,
Maybe the roaches are not happy ?I hardly even see them out eating the fruit when I give them like my turkistans would ..
I am getting some new roaches next week so will follow yours and iclazion's steps :thumbsup:

So this is what the suggestion keeping should like like.
I just keep mine on substrate.






Then Gravid female.



Female not gravid.