starting a new tank, need advice

[nzquiet1]

Greetings all,

am looking to start a new tank (have got a 120x40x40 = about 180ltr) waiting for me to fill. Am planning initially on having some electic yellows and maybe dems. Will be running a fluval 305 filter etc.

First question, do I need to find some egg-crate (??) to put under the limestone, or am I safe in putting it directly on the glass bottom? I'm planning on using pool filter sand as the substaite in this tank which will be a first for me.

Second, what sort of stocking levels can I get with a Fluval 305 as the filtration? At the moment I'm thinking something like 6 electric yellows and 6 dems as well as 3 GBAs, and look to adding more once things have settled into place? When I throw that info into the stocking tool it seems to think I've not got enough filtration but I'm not sure I believe it completely.

Appreciate your guidance :-)

Regards,

NzQuiet1