The sand is hard to clean and the gravel is not? It may not appear so, but with gravel fish and food waste builds up between the gravel, where the sand it will build up on top, making it easier to clean off. If you do not maintain your tank well enough, or the filtration is not up to par, it may be unattractive to the eye. I'm not saying you don't clean your tank enough or your filtration isn't good enough, but I have sand in 8 tanks and it doesn't look gross at all, so I don't know why you have that problem.Bruce Haynes said:Well I will be the one dissenting opinion. Sand sucks. It looks nice for a week or two then it it gets gross. It is darn hard to clean, never looks as good as it first did, it gets in the impeller and is generally a HUGE pain. I had converted to sand thinking everyone's opinion was better than mine, but I was wrong. I have switched back to gravel and couldn't be happier. Sand--PFS or PS is way more work. and quickly starts to look like #%$& in no time. I still have 3 tanks left with sand and cannot wait to get rid of that ugly substrate. Sand is cheap, and you get what you pay for.