the general purpose is to connect a jack to a music device and when music is played, the RGB led should change color with the rythm of the music (frequency) the rgb led would require 3 555 pwm (one for each pin ("R" "G" "B") )
and also 2 pumps would throw water one at low frequency and other at high frequency. i have found the LM2907 to be frequency to voltage converter therefore the input is in frequency but the pumps and led would react to that voltage going out of the lm2907. the lm3914 gives 10 output stages leveled (the case for the pumps) for example at led 3 the first pump would start and at led 6 the 2nd would start.
regarding the amperage, i have found small fans to replace the pumps for lower amperage, i have got 2 fans of 12v. 1,2w. fans would blow foam bits inside a transparent bowl.
is the idea more clear?