how do you get rid of a large patch of zoa's?

[reefbliss2344]

Go down in size from 3/4 tube to 1/2 to 1/4. Or use a rubber band in a pinch to create a quick gasket.

Wrap the straw in the rubber band and force the hose onto it.

 

[saltyfins]

Go down in size from 3/4 tube to 1/2 to 1/4. Or use a rubber band in a pinch to create a quick gasket.

so I would need to buy a new siphon.... or! I could probably use just the hose itself, right? because I'd have that straw...which I have a LOT of those, I make tumblers. I think I will try that, this weekend.

 

[reefbliss2344]

Just wrap the straw with a snapped rubber band to create a seal between the straw and siphon hose. Then get to scraping.