I was thinking about getting some guppies and putting them with neon tetras and maybe a sucker fish and some ghost shrimp but I don't know if the 10 gal I am gonna get is big enough? Also I want to use sand because I heard it helps the ph but the person I am buying the fishtank from is having trouble keeping the fishtank from getting cloudy I am curious if anyone has any ideas. They say the filter keeps kicking up the sand. I didn't ask them if they rinsed the sand before they put it in the tank which I will be doing when I get it. Everything is coming with the fishtank: sand, filter, light, lid, and a few other things. I plan on getting a heater as well for it and maybe a bubble wall. I thought I'd ask a few questions before I started so I know more of what to do with this size of a tank. I am very open to any suggestions anyone has. Thanks!