Hi from Sydney

[Savage Henry]

As said above, the vermatid snails will come in through other stuff. But still, in a small tank like yours you could chip away at them (literally) as they pop up.

The aptaisia and those zoas are the problem. I’m wondering if they are actually polythoas. Anyway, if you do bleach, be careful with them.

I started my tank with bleached/hydrochloric acid washes. It’s pretty easy, just use a plastic tubs and throw it away afterwards.