kribensis

Question
hi i have an aquarium it is 36 inches in length 12 inches breadth and 15 inches in hieght. i am having a power filter and a under water filter ,25kg of sand and 3 big rocks and 3 fake plant.i am having a 5 small flowerhorns their size  is upto 1 inches or less.i am thinking of buying 2 pairs of kribensis of 1 inches.1]can i divide the tank and keep both the fishes together.2] will the kribensis fight.3] and as per you how much they should cost.even i am having a question about my flowerhorns that a when a brought them they were of same size,but now one of them is biggest of all and other two are little smaleer from it.and the remaining are very small as compared to them the bigger one are damaging the fins of the smaller ones.one of them was severly injured .but now it is little bit fine.as i have separated it from others.but now they are harrasssting the other smaller ones.what do do?please suggested me soon.

Answer
As to your Flowerhorns. They do not all grow at the same rate. They are a very aggressive fish. They will fight with any fish that is smaller than themselves. Even other Flowerhorns. This will continue until only the same sized  ones are left alive.
   Kribenis:....Kribs like to breed in a hidden spot like an overturned conconut shell or rock cave. They will exist in a group fine except when they are pairing off. The dominant male will be very aggressive to all the other fish. Ph does not matter for breeding. Pick a pair, divide the tank or use another tank. Put in a hiding place to breed in.