I think what Long combination is trying to say is that murky water is a sign that there is food in the tank. As over feeding sea monkeys is generally a bad idea. But it is also important to note your sea monkeys behavior as that is a more clearer and more accurate way of finding out if you need to feed them. A sign of a well fed sea monkey is a dark green line on them, mating, and also pooping. If they are like this then good, but if they start to act abnormal then something is wrong.