The AQUAvalve cover if used in conjunction with the AQUAvalve allows the grower to create their own basic but very effective hobby system if used correctly. All that is needed is a flat tray of any shape or size. The user then simply places the AQUAvalve in the tray & places the AQUAvalve cover over the top of it. A small weight of any kind needs to be placed on the AQUAvalve cover to weigh it down, a small pot of compost or a stone will suffice, ensuring that you do not cover the small breather hole on the top of the AQUAvalve cover. Once in place simply connect the AQUAvalve to a tank, using a length of 6mm pipe and a filter. Although a very basic method, this home made system following the guidelines above can be very effective. When making your own hobby systems please ensure that the tray is as level as possible and that the pot size is not less than 5 ltrs.