just use a sponge over the intake and you wont have to worry about it. the sand shouldnt get kicked up so much it gets sucked up.
i found black substrate sand at petco for an ok price. it was like 20 lbs for $15 or something. but ya, i don't like buying stuff online unless it saves me enough money that it is worth the trouble. (like $7+) and i do want black sand because i will probably get a black background and my fish are yellow, white, and blue so i think they will look good with the sand and background. what do you think?
I use pool filter sand in mine, big enough to not get sucked up and small enough to look like sand*, and it is wayyy cleaner than play sand IMO. 50pound bag for 9.99 at leslie's pool supply.
do they sell pool sand in black?
Personally, I use white substrate in all my tanks. Crushed coral. It raises pH to about 8 (African cichlids thrive in this pH), and it looks good.
if you have fish that like to dig such as my convicts, there will be periodically sand suspended in the water (if you use fine sand like i do) do the sponge thing. i don't since it reduces the flow of my filter by a ton. when they kick it up my filter is louder, but when it goes down, my filter is quiet again.
what do you mean by "a sponge filter"?