What to get first?

how deep would you recommend I go on the DSB... 6inches?

 

Oh and I am planning on only having Chaeto and a DSB so can the water flow be fast?

 

4 - 6 inches would be adequate IME Brennan
plenty of depth for the anaerobic bacteria to colonise

you want no more than about 5 x the fuge volume in turnover per hour IME
You need to give the macro and bacteria time to break down the nutrients being delivered there


Steve

 

I dont know if you saw my second reply after that but if you know could you answer it ;D

 

I did Brennan, I edited my previous post to accomodate the new question

Steve

 

Choice #2!

 

not my tank volume but the fuges so if it were a 10g fuge i would want 50gph flow?

 

Yes exactly

 

I'd go for the sump, light, then ATO because most people don't use ATO's at all; I just replenish evaporated water with RO/DI water whenever I can