Yes, I DID do a test fill, and that was kinda what got me wondering if I should put a cross bar, center tank? It came with a hinged snake lid, you know, the one with a metal screen mesh, hinged down the middle. I decided to leave it full overnight, just to be certain. I put the screen top back on (to keep anyone from falling in, or something.). I noticed that at the center, the lid no longer fit. I sort of had to push the 2 long edges together a little, as it had bowed out.
Given that, should I put together a cross bar for this tank? I would wait until I got my lid, so I don't do something that interferes with the lid.
Then today, I went back over to the guy that I got the 29
gal from (for $10 by the way) and went ahead and bought the 46
gal bowfront that he had too. (Also for $10). My daughter bought a 90
gal that she's going to use for her snake. She also got a 20
gal long for her fish. The 20 is gonna be for her fish, but not until she has a different place to live. (She is living in a 40' trailer at a Flagstaff KOA with her boyfriend and her working there.)
All of these tanks, $10 each!
I plan on setting up the 29
gal, and putting the bow front away. I'm not really ready for that big of a tank yet. I just figured I better grab it because it is unlikely I'll come across something like that again!
I want to use sand as my substrate in the 29 gallon. I have a Whisper filter for a 20-40
gal. I read on its instructions that its not good for a tank with sand. What filter IS used for a sand tank? Also, I really like using an under gravel filter even when I have HOBs. Could I use one if I screened the grate, to keep the sand from going thru it?
I'll probably star a new thread as I start building this this, so I can get help as needed.
To boil this down, I have on 3 questions(this time😉

1) Should I make a cross bar for the 29?(if so, how?)
2) What type of filter is appropriate for a sand substrate?
3) Has anyone ever used an under gravel filter under sand?
Oh wait, and I need a good cheap place to get sand, black preferably, that glitters some?
Goodnight, y'all!