For about a week now i have been noticing that my skimmer wasent pulling anything from the water, i inspected further and there was a big crack in the collection cup that was letting it all drain right back into my tank. I am going to buy a new cup but what I want to know is can i fix it for now, like will a piece up dict tape work or would that hurt my tank? maybe water sealant? just let me know. THank you!