Trickle Tower verses submerged cycle time

This experiment was bought to an end tonight after roughly 5 weeks.
there seemed little point in continuing with this trial as there appears to be very little difference between the two types of systems, agreed the TT is a little ahead of the submerged filter, but i'm sure you will agree the difference is not enough to cause us to throw a party,in any event the evidence such as it is is here for all to view the TT appear to be about 2/3 days ahead if you can believe there was no human error in identifying the test kit colours, and i have to admit i was expecting more but nothing really remarkable appeared