Snails causing algae

I'm having a 60l nano and have been baffling with the algae problem many months from the beginning. The two inhabitants, nassarius snails both died for reason unknown. After that, a tuxedo urchin was introduced. After 1-2 months from that, two turbos were introduced and both of them died one after another during a month or so.

Now, when there is no snails, only tuxedo urchin, the algae starts dissapearing immediately after the latter turbo dies, before it was a full havock. Right after that the bottom started sizzling with white corepods (maybe), none of these seen before.

Someone has any idea on this?

 

Nassarius snails don't eat algae they eat uneaten food so unless you were putting food in the tank they most likely starved.Turbo snails like most other snails will only eat certain algaes and once they are gone will starve to death. I had one Turbo in a 90 gallon aquarium and it eventually starved. 2 in a nano will definitely starve over time.I am sure the Tuxedo urchin is just taking time to eat it but the bigger question is what kind of algae is it?There are several.

 

Sorry, actually meant Trochus.
Tuxedo ate all the Coralline algae off, don't know what afterwards....

None of the previous has seemingly eaten any hair algae, of which probably the blooming has mostly been.

 

Yeah thats one of the issues with urchins is they will eat corailine.There are very few things that will eat hair algae which is why manual removal and the lowering of the nutrient levels in the tank are really the only long term solution.