Green soupy water

Alright, so I searched through the old articles and I couldn't find anything that matches my situation so I decided to post.

My 10 gallon now has green soupy water! I cannot see the back of the tank any longer and I really want it gone. It started off as brown algae on the sides of the glass, which disappeared once I got new lighting. Then it grew back as green-blue algae which, is because of too many nutrients in the water. So I did tons of water changes and it wouldn't go away! So I scraped the algae off the sides of the tank and then came back a couple of hours later and the water was so green!! AHH!

So I did a lot of water changes but this didn't work at all! Now I have more algae growing on the glass and everything in the tank besides the fishes! They don't seem to mind this at all, but it's really gross and I can't look at my fry!!

I really don't know what to do?! I suppose I could buy an otto but I heard they die really easily during addition to a tank and also I don't have any room in this tank to add anything else. I move about 5 fish to the 23 gallon every week but this does not seem to help either! Also, the fish are fry and I don't know if ottos will eat 'em?? I don't think so but I would want to be 100% sure.

Any suggestions?!

Thanks for the advice, I just added a big cup of water to the 10 gallon from my 30 gallon. I wasn't aware of the whole micro-fauna thing- guess it might have paid off to pay attention/attend grade 10 science lol! The problem with a black out of this tank is that it is in the basement so it won't get ANY light and therefore, the fish will just sleep and will not eat at all. Wouldn't 1-2 days without eating be really bad for the fry??
Should I keep doing daily water changes or will that do nothing?

No fertilizers or CO2 were added to my tank, since there's no plants in the tank. I guess I will have to go steal some java fern from my boyfriend.. lol.. he won't be too happy. 3-5 days without food will definitely not be good for fry, sorry, that's not even going to be considered. The least I will feed them is once a day!!!
As for a black out, what I have been doing is turning on the lights for 20 minutes in the morning, doing a feeding, allowing for another 2-5 minutes to look for leftovers on the bottom and then lights off. When I come home in the afternoon (~4), I turn the lights on and then they go off at 10.
Is this too much light to help combat the algae? I turned off the light in my tank today after one hour of light so it's probably had 1.5 hours of light today.

Okay fry are from early July so... almost 5 months? Some of them are almost adults but they are in the 23. The smaller ones are in the 10 gallon. Over feeding is not possible with these guys, if anything I under feed them because there's no way all of them get to eat. The problem is that when I started I had marbles at the bottom and all the waste was there and I didn't even know! When I moved some to the 23, I saw how much crud there was and algae had already started to grow. I did a massive cleaning and put in another filter to help out, so I assume that helped spark the problem. It is possible that the fry ate the micro fauna because I'm sure they were v. hungry.
So why would a java fern not help again? I am so confused, I forgot to grab one from my boyfriend! *smack* I really don't ever want to have to invest in CO2, and I know a java fern would do really well in this tank since the conditions seem to be absolutely perfect for the algae. Anyway, time to goth myself up 'cuz I'm going trick-or-treating for UNICEF and the food bank! Yay community service!!