Had a diatom bloom. Added a tunze nano stream. Added 2 sets of snails which died right away it seemed. So Andrew and Jaime tested for stray voltage which we think the skimmer is the problem. I decided to upgrade to the tunze 9001 just wait for it to arrive. Great white donated a polyp to make sure that everything else was ready to go...... I am hoping to have more in the tank in a couple of weeks!!