Edinburgh shipped five tries despite taking an early lead at Ravenhill but Tonks insists the result and the performance won't dampen spirits or destroy the confidence that has come from back-to-back wins over Treviso and Zebre prior to their latest loss.
"Obviously it was a disappointing result. To concede that many points is frustrating. We played well at the start and finished well, but went off the rails a little bit in the middle - but the guys are still confident in the systems and what we want to do," said Tonks.
"Those two games we played at home against the Italian sides were huge for us. They were must-win matches and, while they were a little bit closer than we would have liked, they made a massive difference in terms of our league position and a lot of confidence has been taken from that.
"We have good enough players and good enough things in place - it's just a matter of us delivering. It's a learning curve and we're getting there now."
Those sentiments were echoed by head coach Alan Solomons, with the South African convinced his side are on the right track, even if results aren't quite yet as impressive as he would like.
Edinburgh showed just how good they can be when they toppled former European Champions Munster in their Heineken Cup opener at Murrayfield last month but Solomons says victory in the league against Connacht this week is vital as they look to return to continental competition on a high.
"The match against Connacht is very important for us. If we deliver a performance then we have every prospect of getting the result. It's absolutely critical for us," said Solomons.
"We still have a long way to go. A lot of the time we are being punished because we're making errors. I think we are continuing to make progress and will continue to get stronger and stronger as the season goes by."
Edinburgh are currently third in Pool 6 in the Heineken Cup but, with all four teams having won one and lost one, they are just two points off Perpignan in top spot and a single point adrift of Munster in second.
They welcome Gloucester to Scotland on Sunday, December 8, before travelling to Kingsholm for the return tie exactly a week later.