Those are bigger than 25cm I'll bet you. Thought mine was 12cm somehow he died (still scratching my head over that one) and took him out measured him at dead even 15cm so my other SH which is bigger would be at least 18cm still a redline and doesn't look anywhere near the 25cm you claim yours are. They are awesome by the way and can't wait till mine gets to that size. What do you feed them? As for websites you have already found the best source here 
