I seeded my tank with your mixed pack of pods a few months ago and even with my mandarin and a few other fish feeding on them, the population of some seem to be holding fine. It seems that I never see the Tigriopus pods. My question is which type of pods is best for feeding the Mandarin. I feel there is value in restocking the pods periodically and am curious if I should stick with adding the 3 pod mix or if I should go species specific. Thanks!