Miscellaneous Crustaceans

Cladocerans
Various Cladocerans ( not quite microscopic )
Daphnia

Look very closely, and you may see swarms of Daphnia ( right ) swimming jerkily through the water as they feed on microscopic algae. These tiny "water fleas", are an important link in the food chain, converting plant plankton into animal.

Daphnia

Tadpole shrimps ( left ) grow much larger than daphnia, up to 1 inch. They are capable of swimming but are usually found crawling on the bottom, on plants, or burrowing. Their eggs are highly resistant to drying, which makes Tadpole shrimps well-adapted to life in temporary pools.

Tadpole shrimps

Freshwater shrimps are similar to their saltwater cousins and are usually small ( 1-2" ) and transparent.


regulator

Hose protectors are those funny rubbery tubes that fit over the ends of your air hoses. Their purpose is to prevent the hose from being bent sharply at the connector, which will eventually cause it to fail. However, they are practically impossible to put on. Here's a hint that makes it easy:

Soak the hose protector for a few minutes in not-quite-boiling water. This will make it much more soft and pliable. Then fish it out and jam it onto the hose quickly before it cools and hardens. Be careful not to get water in the hose orifice. Maybe I'm slow, but it took me quite a while to figure out this simple trick.