A water spraying device for fixing to a wall defining an above ground water cavity, the water spraying device comprising: a base having an upstream end and a downstream end, the base including: a head portion configured to be positioned adjacent an inner surface of the wall of the water cavity; a connector having an external surfaced threaded with a coupler configured to be positioned adjacent an outer surface of the wall of water cavity, wherein, in use, the head portion and coupler cooperate to clamp the wall between them; a spraying portion configured to be coupled to head portion; an aeration nozzle for spraying water infused with air into the above-ground water cavity defined by the wall, the aeration nozzle comprising: a nozzle body (17") comprising: a first internal conical portion, the first internal conical portion including an upstream end and a downstream end, wherein the downstream end is smaller than the upstream end; and a second internal conical portion, a smaller, upstream end of the second internal conical portion being congruent with the downstream end of the first internal conical portion, wherein the nozzle body is assembled within the base a water way extending through the nozzle body (17") the first internal conical portion (16',) and the second internal conical portion; an air way extending through the nozzle body, wherein the air way intercepts the water way at an air outlet within the nozzle body (17") at the junction of first internal conical portion and second internal conical portion such that air enters water way at its narrowest location and in a direction perpendicular to the flow of water through water way a check valve disposed along the air way, wherein the check valve permits air to be pulled through the air way and into the water way by way of a vacuum force caused by water flowing within the water way through the first internal conical portion and prevents water from entering the air way. a base having an upstream end and a downstream end, the base including: a head portion configured to be positioned adjacent an inner surface of the wall of the water cavity; a connector having an external surfaced threaded with a coupler configured to be positioned adjacent an outer surface of the wall of water cavity, wherein, in use, the head portion and coupler cooperate to clamp the wall between them; a head portion configured to be positioned adjacent an inner surface of the wall of the water cavity; a connector having an external surfaced threaded with a coupler configured to be positioned adjacent an outer surface of the wall of water cavity, wherein, in use, the head portion and coupler cooperate to clamp the wall between them; a spraying portion configured to be coupled to head portion; an aeration nozzle for spraying water infused with air into the above-ground water cavity defined by the wall, the aeration nozzle comprising: a nozzle body (17") comprising: a first internal conical portion, the first internal conical portion including an upstream end and a downstream end, wherein the downstream end is smaller than the upstream end; and a second internal conical portion, a smaller, upstream end of the second internal conical portion being congruent with the downstream end of the first internal conical portion, wherein the nozzle body is assembled within the base a water way extending through the nozzle body (17") the first internal conical portion (16',) and the second internal conical portion; an air way extending through the nozzle body, wherein the air way intercepts the water way at an air outlet within the nozzle body (17") at the junction of first internal conical portion and second internal conical portion such that air enters water way at its narrowest location and in a direction perpendicular to the flow of water through water way a check valve disposed along the air way, wherein the check valve permits air to be pulled through the air way and into the water way by way of a vacuum force caused by water flowing within the water way through the first internal conical portion and prevents water from entering the air way. a first internal conical portion, the first internal conical portion including an upstream end and a downstream end, wherein the downstream end is smaller than the upstream end; and a second internal conical portion, a smaller, upstream end of the second internal conical portion being congruent with the downstream end of the first internal conical portion, wherein the nozzle body is assembled within the base a water way extending through the nozzle body (17") the first internal conical portion (16',) and the second internal conical portion; an air way extending through the nozzle body, wherein the air way intercepts the water way at an air outlet within the nozzle body (17") at the junction of first internal conical portion and second internal conical portion such that air enters water way at its narrowest location and in a direction perpendicular to the flow of water through water way a check valve disposed along the air way, wherein the check valve permits air to be pulled through the air way and into the water way by way of a vacuum force caused by water flowing within the water way through the first internal conical portion and prevents water from entering the air way.