I used to have dragon gobies. My first dragon goby was a small one then I got a slightly larger one. The first one died.. It was stiffening up and having weird twitchy seizures. Then my second one got to a foot long and was as thick as a man's finger, I loved it! But he died too. Same way as the first one, stiffening up and twitchy seizures. I saw a video where this woman has HUGE gobies. Here's the link Absolutely beautiful! I kind of want gobies again but I'm afraid they'll seizures again.. But today I got a black ghost knife fish and I hope he grows big too! I also have a golden dojo loach in the same tank with the knife fish, along with other fish, and that loach is my favorite fish cuz he's so cute looking and he does a fine job of bottom feeding. He's not as big as the one in the video but boy I really hope he grows as big! How do I get my dear fishies to grow big and not have seizures? I'm not an aquarium genius, but I do change the water every now and then, and I change the filters as needed. I feed them what is recommended to feed them. I put de-chlorinater in when tap water is put in, but we use filtered water, tap is usually a last resort. And I stare at them alot.