I live in the SE USA and I've never seen Southdown once at a Home Depot or Lowes,,, from Islamorada to Daytona to Raleigh,,, Nada,,, Zip.
So,, where all the white sand at??
My word,, that's bulgy. My clowns don't look like that when they're pregnant,,, they get fatter around the middle, rather than pointing downwards.
Is it eating and pooping ok? If that's a blockage, it's about the worst I've ever seen. Try googling for articles about Epsom salts and inestinal...
I've heard good and bad about glasscages as well,,, mostly it seems to be glass thickness and untidy silicone.
How thick is the glass they use on the 300g compared to oceanic?
I think your choice is fine,,,, I run the same on my 75 except I use PC's for actinics. I often wish I'd sprung a little extra for 250 watters though :)
I'm using the xm20k bulbs at the moment and they're pretty good,, nice and blue. I've used the Hamilton 20k bulbs as well but after a...
Don't know if I'd want chaeto floating around my display tank,,,, I would construct an in-tank fuge like that Bob character otherwise it'll be getting minced in powerheads or blocking light from your corals.
I have chaeto in my fuge under 110 w of PC's,,,, every couple of months I have to throw...
I had a Gold Stripe Maroon that loved her Condy,,,, I think clowns take to these anemones a lot more often than is generally thought,, and I don't believe 90% of the 'oh no, a condy ate my clown!' stories I hear now and again.