I have similar problems with my greenhouse grown cukes. One year I did call Extension Service and was told to feed with two things. One I'm pretty sure was bone meal. Whatever combo it was worked. I have never been able to remember the other and when I called Ext. Serv. again no one knew what to tell me. And of course, I couldn't remember who I talked to. (There is no Ext. Serv. where I live, so I've never gotten acquainted!) I would surely like to find out what that other thing was!

I see in the last picture link that bag of cactus soil. Did you amend this soil when you potted your Aloes? It doesn't look like you added much perlite or gravel to the mix, but maybe you did. This soil can compact and dry out. Once it is dry, it is very difficult, if not impossible, to get it hydrated again. Water will run around the hard dry soil, but not through it. So then your plant is not getting the water you are giving it. I have had plants appear to have nice moist soil, but the soil around the roots was compacted and dry - meaning my plant was very thirsty. The leaves on your aloes look thin, making me think your plant is not getting the water. The recent rain may have soaked through any dried soil. Let's hope so! The color doesn't concern me as much as the thin leaves. These 2 plants had pretty much the same growing conditions. The one on the right did receive more of the evening sun. That one stayed brownish, but both had the plump leaves one expects to see.

The part that sits near the wall is not getting enough light. Ferns LOVE to be watered overhead, with the water in the form of a shower that wets where the fronds come out. (And fronds too, preferably.) You will notice new growth if you water this way.

@alisa they look like they match the color of the markings! When I get back to Guam I'll send some photos. My weather is very similar to Singapore's (humid and hot all year round) so my current watering rituals are to water once a week, slowly until water comes of the bottom of the pot. I don't have a specific ratio of what my soil mix is, but it's made up of a little potting soil, pebbles, and soil from my yard (which has more little pebbles). Throughout the day (7:30am-6pm), they're outside on my west-facing window sill and catch the late afternoon sun. I've had majority of them for 2 weeks and so far they're all still alive. Loving the learning process and I'm so happy to discover this super cool community!!!