New bare bottom Nano Tank 8 g

[mac_aquarius]

Hi,

I try to setup my new bare bottom Nano Tank 8 gal (around 30 L) for my SPS (running since 24th Sept 2011).

Could you please help to advice is my LED sufficient to support my SPS. All my SPS still temporary place at the bottom of the tank.

- Green Poci looks good no bleaching & polyp full extended,
- but the digitata a bit bleaching and pink Poci polyp (bought 2 weeks ago) not full extend the polyp.

I was suspect my NO3 was too low (undetectable using API test kit) or LED light not sufficient. Could this be the case?


Dimension: W 43cm X D 23cm X H 30cm w
Lighting : Pure LED - 3 w X 7pcs Royal Blue, 4 w X 1pcs Cool white ( 6000K) total = 25W
Chiller : keep at 26-27 C
Live rock= 3 Kg.
Filter: Basic aquarium floss or fiber + Caulerpa
Ca = 430 ppm, KH=11 dKH, Mg=1280 ppm, SG = 1.023 (Instant Ocean salt)
25% WC every 2 weeks
No Skimmer: the tank is too small to fit in a good skimmer.


Tank mate:
1) 1 x Sea hares - http://www.mishaspets.com/Aquatics/images/2836_nudi.jpg
2) 1 x turbo snail


SPS:
1) Peach Montipora Digitata
2) Orange Montipora
3) Green Pocillopora
4) Pink Pocillopora
5) Pink Bird Nest


BR,
Mac