what are better astrea or turbo snails

I've found that std trochus snails are a good long term solution to the astrea habit. They rarely come off the rock/glass and when they do they can flip themselves.
Most turbo species prefer cooler temps than what a lot of us run our tanks at for best health. They do comsume a ton of algae, but are definately bulldozers.
 
I prefer Trochus to Astreas as well. In my tank I keep a mix of Nassarius, Trochus, Cerith Snails... and a few Emerald Mithrax Crabs.
 
Trochus are by far the best. Although expensive at first, they do reproduce in your tank in time. Just caught one of mine "smoking".
 
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