6 months is a great time for any new reef. Especially when started with dry rock. When you start a new tank the first 2-3 months the tank will go through various algae blooms depending on what's all in the tank, how well you maintain it, and when or if you started running media to help combat some of the issues.
if you are fairly maintenance savvy, and keep the tank clean, it will start to hit its sweet spot around the 6 month mark. In other words, you have grown beneficial bacteria on you rocks, in the pipes, sump, glass, etc. you may have a nice macro algae population by this time and pods and snails should be added if you didn't do so in the first couple months. I like to get mine in there about the 2-3 months mark and make them work.
depending on what anemone you plan to add, most will do fairly well by this time. If you're trying to add expert anemones, you'll need to be experienced or I would say it's really best after the tank has been up for a good year and you understand your water chemistry better.
Some nems like clean water, while others thrive in higher nitrates/phosphates. There's a difference between an older well established tank with high Po3 & Po4 vs a young tank with the same levels.
Take my take for example: I've had it up for a couple weeks now and have the two hardest to keep anemones in the world in it right now already. However, I transferred all my old LR and LS. I'm running media, dosing, and skimming wet. I had to cut my skimmer & reactors off yesterday because I stripped the water column too much and could tell my nems were getting irritated.
So my Gigantea is already inflating again and my Magnifica is 2x as full. Here's a pic. Just don't add a nem with bleached white rocks unless you want it to die or you really know what ur doing. Let ur tank get juicy with good coralline and macro algae growth. Good luck.
