I don't claim to be an expert by any means. That being said, IF you need higher light output I would recommend one of the relatively cheap ($78 approx) Chinese LED
lights that are sold under various names. For a 30 gal
I would think one would suffice (they have a two foot spread per ... not sure of typical dimensions for a 30g).
165W LED Aquarium Light Full Spectrum Dimmable for Fish Reef Coral Marine Tank | eBay
This is a lot cheaper than any of the other options I found (went through this process recently) and so far I am pleased with the product.
As far as test kits, everyone has an opinion. I don't doubt red sea and hanna checkers are superior, but liquid test kits from API are dramatically cheaper and work well enough for someone starting out. If you started getting $100+ fish/corals then it may make more sense to pay twice as much for one of the better kits.
Anemones and stars are not the easiest critters to keep alive. I think you would have a better experience if you avoided them.
As for this fish... I'd get the liquid test kit to see where your ammonia/nitrite/nitrate levels are. I always thought inverts were more sensitive to crappy water parameters - so I would have thought they'd be the first to go if the water parameters were off.
I'm a bit of a newbie myself as far as sw
goes. Had a fw
tank for over 10 years and had a 30 gal sw
tank like yours about 15 years ago. I do recall the one anemone I did attempt to keep lasted for about six months, then ballooned up to 2-3 times its size and croaked.
Keep at it. There are a lot of people here other than myself that are extremely knowledgeable and helpful that will help get you on the right path.