emperatos
The light should be ok I use 3x250M/H the mantel go up because of the 2 Tunze streams, they get some nice current, not to strong but there is always and upward movement when it hits the back off the tank, I will put and over head shot tonight so you can see the colours, the purple one looks great under actinics,
I have had this 2 for 5 months now and the only one that seems to have grown is the purple one about 10% in size, I cant really tell with the brown one but I will take out tomorrow and meassure with a caliper for refrence and do so every 6 months.
thanks cisco