How would you go about adding a bridge of some sort in this spot?

[Drewe]

The red line is approximately where I'd like the bridge. I need more high-intensity light & flow space as well as more shadowed areas for some leptos.

Removing the rocks in tank to glue anything is pretty much a no go - is there a way to do it in tank without risk of it falling over? I have the rock, I just don't know how to do it safely. Thanks in advance

 

[Sharkbait19]

It was over a much smaller space in my tank, but to make bridges in mine I glued pieces of rubble together and then sat them on the rocks where they wouldn’t (easily) fall. Took a few tries to get one that wouldn’t fall apart though.

 

[ying yang]

Get one large piece of rock and epoxy it at least 3 points on each side at both edges where you attach to the other 2 rocks ,use some other rocks or pvc pipe or something to wedge them up till epoxy hardens is what I would do or get a few dry rocks of smaller sizes and glue together outside tank then epoxy in

 

[kzenoni]

You could try this, I’ve got a 350 gallon and started making these for the same reason.

 

[Drewe]

Get one large piece of rock and epoxy it at least 3 points on each side at both edges where you attach to the other 2 rocks ,use some other rocks or pvc pipe or something to wedge them up till epoxy hardens is what I would do or get a few dry rocks of smaller sizes and glue together outside tank then epoxy in

Using pvc/rocks to brace while it cures is brilliant. I'm going to scream if it still falls whenever I remove the brace though I'll update with photos here in a few hours

 

[ying yang]

Using pvc/rocks to brace while it cures is brilliant. I'm going to scream if it still falls whenever I remove the brace though I'll update with photos here in a few hours

Ok goodluck but remember if it fails then I didnt suggest it ha ha .
Nah only joking it should be good just remember have least 3 anchor points of epoxy on each end to fasten it to the main rockwork so it can't twist/ shift/ spin with the flow in tank or under its own weight if get what im saying .
And in water rocks are lighter / more buoyant especially saltwater .
I used this method to put an extra rock on a nearly vertical piece of my main rockwork,was smaller piece than you will need by looks of it but still a big chunk so could add an extra overhang/ cave and used other rocks wedged in whilst it cured as a lobo literally1-2 inch in front and under it if the new rock fell

 

[ying yang]

Red outline is roughly size of rock which is like 10 inch wide by 6-7 inch high by 2-5 inch wide and round circle outlines are the epoxy and as can see it nearly vertical at that part of rockwork as under there lots caves and been few months with no trouble so far and tried few times after did it the push/ pull/ poke and prod test so yours should be ok as looks like the bridge will be resting / sitting on both sides of your rockwork

Had to take screenshots of it from pics as still trouble with site or trouble with something not letting me share most pictures lol