Like many of you, I enjoy the clean appearance of rimless tanks with no lids, however I've had at least several shrimp crawl out of the tank and commit suicide. I lost a prized female yellow neo who had solid opaque coloration, due to what I believe were males harassing her to mate. I think she crawled out trying to escape their advances. Anyways, I keep the water level 1.5cm below the tank edge, if I were to reduce this to an inch, would that be enough to prevent crawlers?