The lighting fixture looks like it's designed to fit directly on to the top of the tank, but I'm concerned about the salt water getting up into the contacts. Should it go on top of the glass instead?
typically this would cause a heat problem, but with a 20w light you can set it on the glass
Is there some kind of lighting I can add to be able to observe night-time behavior?
Blue LEDs - make your own, or you can buy them set up, called moonlights
The filter hangs on the back of the tank. Where is the best place to have the intake/outflow of the filter?
what ever looks best
The only way I've thought of to evaluate the water flow through the tank is to drop some food flakes in and watch how they move. Overall, the flow throughout the tank looks okay to me, but I'm not a fish.
additional flow is best added with powerheads - maxijets would be good for your setup. since you will not have corals then you really only need enough flow to keep algaes down and to keep detritus off the bottom so the filter can pick it up.
I'm not doing anything to monitor minerals like calcium or magnesium. Is this important, given my goals (no corals or anything ambitious like that)? just monitor PH and nitrate for your set up
Based on my reading, I'm wondering if I should separate the crab and the fish. Evidently, these crabs get *huge*. (The pic I cited earlier says that the crab in that pic is nearly as big as the photographer's fist!) And they have a reputation for not working and playing well with others. So I'm thinking it might be best to give him his own tank. I've also read that these crabs climb seawalls and whatnot, so I'm thinking it would be nice for him if he had some dry ground to wander around if the mood strikes him. So I'm thinking that perhaps I should get a frog-type tank (long, relatively low, relatively small) and give him an area with water with a sandy bottom and an area of land. I'm not sure if he'd like a companion and I'm also not sure where I will find shells big enough for him as he grows. Or am I just being entirely silly about this? If I put him in his own tank, would it be a good idea to add it to the circulation of the main tank? I'm thinking that way he could feed partially on the floaties from the main tank (pre-filtering) and then the water would go from him tank to the filtering system and back to the main tank. If I understand things, this would essentially be a sump? OTOH, I'm looking for an immediate solution to get us through until we move and more long-term solutions could wait until after the move, assuming everyone survives.
i got rid of my gulf hermits - LFS - they did not bother any fish but they were too big and kept knocking things over. blue leg hermits work a lot better
And I'm thinking how to stock the 29 gallon tank. The damselfish, obviously. I understand that damselfish like to be around other damsels, but not too many other damsels. Or are there some types of damsels who prefer not to see anyone else who looks like them? If so, how can I find out which is true for the neon velvet damsel? In addition to that, I'm thinking I want some kind of (fish) cleaner fish because it just seems like a good idea. I'm considering a neon goby (I just like the neon blue on a dark background, I guess). I want somebody to help keep the inside of the glass clean, which I think would mean snails (and might add to the importance of segregating the hermit). And somebody to see to sand stirring/maintenance (especially if I segregate the hermit).
consider what fish you really want before adding any more damsels. damsels can be aggressive and may preclude the addition of more interesting and passive fish. read up a lot on fish compatibility
The tank is still cycling, of course, so there's no urgency here, but I'd appreciate any feedback.
Thanks for taking the time to read all this.
here are some links for reading and consultation
www.wetwebmedia.com
www.reefkeeping.com
www.advancedaquarist.com
www.melevsreef.com
read as much as you can and take your time. post all your questions to this site and you will get good advice.
a good starter book is "The New Marine Aquarium" - Michael S. Paletta
Welcome to ARC and to the obsession laughing9.gif