General view.

Attached to the front is a small double valve, held on by self-adhesive velcro. A slot has been cut into the edge of the lid where the 6mm airline enters the tank. The blue 'handles' at the ends of the tank flip up and lock the lid in place.





Front View.

This view shows the airstones at the bottom with the board support above. On the left is an aquarium thermometer which goes up to 50 Celsius. The liquid shown here is water (for testing just after making it), and the quantity is 1 litre. The board support is actually garden centre plastic netting for supporting pea plants. It's quite rigid and can hold a shape reasonably well when bent. It's sized such that the lid pushes down on the raised parts to ensure that it's held in place.





Frying Tonight!

General view of internal arrangment

The thermometer is in the top-left corner. The incoming airline passes over it and is routed down the middle of the tank side to the airstones. Some additional airline fittings are held onto the opposite end to help keep the airstones in place.





Feed to airstones

The airline is held in place using clips fitted to suckers. The line is split by a T-piece and short pieces of tube link to 90 degree elbows. More short bits of tube then connect these to the airstones. The connectors are a better way of turning tight corners - the tube would flatten with such a tight radius, and this method helps to keep the stones nicely lined up along the base of the tank.





Airstone retainer

To stop the free ends of the airstones from sliding about during use, and from swinging around when the tank is being tipped up for emptying, some more bits of airline and fittings were used to create a sort of 'inverted fork' held in place with another sucker-clip-thingy. The short pieces of tubing were cut such that there would be no tube between the fittings, thus reducing the chance of flex in the arms of the 'fork'. The clips hold the tubing quite tightly, with the result that there is no upwards slackness, as well no sideways swing.





The pump.

It's a twin-outlet aquarium pump. I chose it on the basis of capacity and price (bang for buck!). The two tubes merge into one just out of shot by means of another T-piece.