As much light as possible. Light, light, light.

That's an incredibly well-developed (branched) tree, and would be a real shame to lose it.

What was in the potting mix that decomposed and turned the effluent yellow? Cactus mixes are usually peat-based and hold too much moisture for citrus...let alone cacti. At this point, I think you should *not* re-pot, but you might want to inspect the roots.

Stick a dowel or wooden skewer all the way into the container and use that to determine when the lower layers of the mix have dried out. This will help prevent over-watering.

When/if the leaves begin to re-grow, fertilize the tree.

Josh

Damn thats a nice Meyer!

Hope it pulls through! And get that sucker some light! I know it might be hard because of the cold weather

I agree..What a beautiful shape even without the leaves..I hope it does pull through..

Just some simple steps might help.

As Josh say's light which you probably already provide..It looks like a sunny window.
A very well draining soil mix always and if you it not, use a wick on the bottom to help drain.
Flush your mix as you already did since it seems to be in a very fine mix which can collect salts from the fertilizer you use or your tap water which can look kind of orange yellow..
A wooden dowel as Josh says will help prevent over watering..

How do you know you over watered? When did you realize this?
Is your tree free of bugs too?
Has it seen a freeze or at one time been under watered?

Mike

Thanks for everyone's response :)

Hi meyermike_1micha,

I know I overwatered from having the pot sitting on the floor with a plastic water catch thing. It sat in water for a bit before I had someone help me get it onto the rolling crate that it now sits on.

I did notice one really small bug by the underside of the pot when I was flushing the soil. But other than that, nothing else.

As far as freezing, I don't think so. I brought the tree into the house early October, but there were a couple of nights the temp. was around 45-50 degrees, so maybe that??

I had been watering it once a week, with 1 pitcher of water until the time that I watered with an additional pitcher (which I thought it looked like it needed) and then discovered the extra water in the base pan the next day.

I am an inexperienced gardner and have no idea what to do other than getting some additional lighting (grow lights??)

Should I flush the soil again, just in case my cat had pee'd in the pot? Should I give it some kind of food/fertilizer?

45 to 50 degrees isn't a problem. Meyers in pots are fine as long as the temp doesn't go below 32.

I wonder if the potting mix has dried out? I would think that size pot would be able to retain more water than you're applying.