Just an update, had this blue gig for 4 weeks today, it's doing great, opened bigger than when I first got it, mouth tightly shut all the time, never seen it deflate once.
Feed it some krill once or twice a week and dose kent iodine daily. No skimmer, it's in a 3ft tank directly under a 150w 20k bulb which i'm going to change to 14k soon as although it's doing great it isn't colouring up as quickly as i'd hoped.. still only the tips that are a nice dark blue, the rest of the tentacles are a dark tan colour.
This is the best pic I can get as after a week I moved the flow and it went round the back.. as basically in the middle of the tank I have a sort of rock bridge and it's round there. Still gets full light. If I were to turn the tank around it'd be on perfect display.
Here is a tiny part of it that's visible, shows the tentacle colour atleast (i'm not going to try move it, if it's happy there then so be it. It's also in a tank with my 2 smallish green BTA's):
Would love to hear your thoughts on it, never owned a Gigantea before. Is 4 weeks a very good sign or still early days for this species?