consolidating tanks.... what to do with small tanks

i am starting a 40gal breeder reef tank. i have a 14gal and 29gal biocube that will be left behind. Any ideas on what i should do with these tanks? Of course there is the idea of selling them, but thats the last option and kinda lame
So i was wanting to turn them into something really unique but simple, because most of my time will be spent on the new, bigger tank.
This is the equipment that i will have after moving most of the livestock into the 40gal Breeder.
Tank #1
14gal BioCube
150watt JBJ K-2 Viper MH (but also have the stock hood and lighting).
3gal CPR Pico w/ 18watt CF 50/50 bulb (currently hooked up to the 14gal Biocube and used as a refugium with cheato, mangroves, various macro algae).
Established LR and LS

Tank #2
29gal BioCube
150watt JBJ K-2 Viper MH (but also have the stock hood and lighting).
Established LR and LS


So i have a couple of ideas and would like some ideas from you guys as to how i can make these tanks into something awesome.
1. I was thinking of just having a softie tank, :-/ well maybe a few LPS, with only inverts and maybe one fish. I want to keep the need for water changes down.
2. I was also thinking of a macro only tank. Would be really cool to have pipefish and seahorses, IDK???
3. I was thinkin a freshwater planted tank would be sweet.
4. I thinking of a Frag Tank but you need excellent water quality and a decent amount of equipment.

Any ideas???

 

would try option two. just think it would be cool and simple or the frag tanks sound good as well, but option two just sounds really cool eith the pipefish of course.

 

seahorses are awesome! XD i'd go for the seahorses and pipefish myself

 

Make the 29 a sump and the 14 a refugium. The 14 could be a display refugium with a variety of macros in it. If you have a sump then make the 29 the refugium and have some pipefish in it.

 

i like 2in10's idea as well. it would be cool to look at, and benefit your new tank.

 

a say a anemone with clowns

 

seahorses and bio cubs dont mix well i think. i think that they are just too short for horses. pipe fish are a diffent story though but i dont no much about them.

 

This sounds like a great idea! The reason i dont want to have three separate tanks is because they all have separate parameters. Which means testing everything three times, doing three pwc, lost of salt and supplements, etc. This way i could just have one system;D How would i go about plumbing a biocube to work as a display refugium with my set up? I have a 40gal breeder with a Bean Animal overflow, plumbed down to a 15gal sump. Here are a few pics of it.



Can the refugium just be gravity fed? What i was thinking is that i could use the water and air standpipe and just plumb it to the biocube that would sit lower than the 40gal breeder. Would i need to drill the biocube to get water from it back to the sump Maybe i could use a cheap small pump that is set up in the back of the biocube where the original return pump sits but keep it higher up in the chamber so if the overflow from the 40 ever stopped flowing to the fuge it would only pump a few gallons of water into the sump instead of the whole fuge?
What do you think?
Any other ideas would be greatly appreciated.

 

This won't be the most exciting thing to do with one of them, but if you don't have one, making one a quarantine tank would be the way I would go, and then make the other one a sump and/or fuge maybe?

 

actually I like that idea and think it would work that way but then again I would just drill it.