Gas will flow through the easiest way out.
By using Ts you could run several DIY-powerhead diffusors as long as you achieve proper adjustments to counterbalance naturally occurring discrepancies and by trial and error achieve equilibrium (e.g. using valves to restricting the output with less resistants to match the one with more) just the same principle at work when you use one airpump to feed multiple devices.
There might be other more accurate and technical ways of doing so wait for the experts.
Pepe
Santo Domingo
By using Ts you could run several DIY-powerhead diffusors as long as you achieve proper adjustments to counterbalance naturally occurring discrepancies and by trial and error achieve equilibrium (e.g. using valves to restricting the output with less resistants to match the one with more) just the same principle at work when you use one airpump to feed multiple devices.
There might be other more accurate and technical ways of doing so wait for the experts.
Pepe
Santo Domingo