assembly 900 and each modular interconnected section of the trunk 210 described depicted and or embodied herein inclusive of t fitting sections 280 extension sections 290 and end caps 260 has an air line 445 integrated into their interior wall that extends the length of the section and in the case of a t fitting section 280 an extension 446 releasably connected to the air line 445 extends outwardly from the air line 445 into the perpendicularly aligned portion 284 the air lines 445 integrated within the t fitting sections 280 and extension sections 290 as well as the air line extension 446 are hollow channels having open ends whereas the air lines 445 integrated within the manifold 240 hose connection assembly 900 and end caps 260 are hollow channels having an open end that corresponds with the open end of the respective section or component and a closed end wherein the closed end is configured to prevent air from unnecessarily escaping from the air line with reference to fig1 a and 11 b in a preferred embodiment an air diffuser 450 is connected to the air line extension 446 to aerate the system the diffuser 450 is a two part air diffuser 450 having a generally l shaped hollow upper portion 451 removably connected for example by a male female friction fit at its lower end to a hollow lower portion 452 a nipple 454 extends outwardly from the upper portion 39 s upper end wherein the nipple 454 releasingly engages with the air line extension 446 for example by a male female friction fit within the perpendicularly.