second tank

What would be an ideal second tank? I am struggling on going for a the frag tank, pico reef, or a bigger upgrade. I really like the lagoon open top tanks from reef casa, it is an AIO style, going for their pico reef with a small scape and invert only. Or a frag tank dedicated to frags and...

So nearly three years in, still loving the hobby so thinking of an expansion! My red bubble tip anemones have now outgrown their dedicated bommie and starting to wander, which has caused some irritation and loss to my SPS - I'm at the point where they've outgrown my Red Sea Peninsula 650. My...