I disagree with people that SPS in a pico is impossible. I have a 5.5g with an ac 70 refugium and have acros and birdnests in my tank. As far as parameters go you just need to be really OCD about water quality and levels. Also an ATO will help greatly. I have an ATO on my tank and my water level never really moves.
I will say though I have a 70 watt MH over my tank so Im not sure about the PC lighting. You might want to check out nanoreef because alot of people have sps in picos over there.
I will say though I have a 70 watt MH over my tank so Im not sure about the PC lighting. You might want to check out nanoreef because alot of people have sps in picos over there.