It really is a game changer, & I CAN'T STAND that expression lol.
I didn't get the bubbler attachment for the purpose of putting water in it... (let's face it, without a stand for your Seahorse, it's not going to be very practical) you can't set it down with water in it, &... its a bit small, so, you WILL drink it, I promise, lol. No matter how little water you put in there...
So don't put any in! You don't need it! It's perfect to double the length of the chamber & give you larger, cooler & smoother hits, even without the water.
It's definitely worth it: I put mine on and haven't removed it.
(I only tried putting water in it a few times... & yes, it did make it a bit better still, but I personally think it's a great addition whether you get the stand for it & use the water, or just use it like I do.)
5 stars for sure!