Looking back, I think I was too complacent to check the creeping invasion of algae. Very embarass to announce that my aldro has unceremoniously come to a sad close. Algae killed them all despite my wife gently finger bushing strand by strand, changing water, Yamoto shrimp etc.
There is salvation afterall, Jonathan managed to overcome the algae problem in his thread
https://forum.petpitcher.net/showthread.php?t=1498 Do go have a read, its good!