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I use test kits from API:
pH, ammonia, nitrite, nitrate, hardness

For their main food source, I use calcium-enriched algae pellets.

Not every cray will eat fish, so I wouldn't worry about that at all.

A 10 gallon might be ok for your crayfish right now, but it will eventually require at least a 20 gallon tank (ideally 30+).

Here are some steps you can take to help out your cray:

• Remove any old food. Do a 50%+ water change, being sure to use a dechlorinating water conditioner like Prime. Make sure the water is about the same temperature as your tank. Repeat water changes at least every other week. Test your parameters to make sure they are ok!
  
• Turn your tank lights off (if you have any) and add some more hiding spaces. Try not to spend too much time right next to the tank, or interacting with your cray in any way. It needs time to adjust to its new surroundings. It probably doesn't feel safe just yet.
  
• Offer a small piece of algae wafer or blanched vegetable every other day or two. Remove it if not eaten.
  
  It's great that you're reaching out for more information. It sounds like you and your cray will really benefit from doing some more online research. Read up, there is a lot to learn!

First, I would remove the male, leaving only the gravid female. Assuming the eggs are fertile, you'll slowly see them develop over the next few weeks until you can begin to see little crayfish inside each one. I don't think you need to swap out your filter; I prefer covering the intake with a sponge pre-filter (e.g.). I say this because you're going to want to keep your tank clean while minimizing water changes which could lead to you sucking up tiny crayfish.

Once you get to the point where eye spots develop in the eggs (two little black dots), you'll know the eggs are close to hatching. Monitor them closely as you'll want to remove the female shortly after the babies hatch and begin to move around freely. If you don't remove the female, she'll eventually eat the babies.

Once the babies are on their own, it's pretty easy. I feed them like I do adult crayfish, except that I grind the food up a little bit. For example, ground up algae wafers are always welcome. Make sure you provide plenty of hiding places for them to seek shelter when they molt, which they will do very frequently at first.

Good luck and keep us posted!

It's not really gonna grow biobacteria on anything but the very surface of stuff with just the bubbler sitting in there.

Whether or not it will support enough bio-bacteria just on the surfaces of the tank is gonna depend on the size of your tank, how much you feed, how much you clean it, and how big your air pump is. You can't really know for sure without testing the water periodically after you remove the sponge filter since there's too many factors to take into account. It's possible it is enough, but nobody can accurately say for sure.

Could you try a corner filter like this instead? https://www.amazon.com/Corner-Filter-Aquarium-Internal-XY-2008/dp/B00HSCB9GC/ref=sr_1_4?ie=UTF8&qid=1500855910&sr=8-4&keywords=corner+filter+aquarium It works similar to the sponge filter but everything is enclosed in plastic so they can't eat it. I've used them with just gravel in them before. Or you could try to do similar with PVC pipe like u/VolkovME mentioned, but unless you already have PVC lying around it's probably cheaper/easier just to buy a corner filter.

First days got up to 89, then down to 86 for a couple days and then back to normal temperature. Do this only if your fish can tolerate high temperatures otherwise 86 will work it’s just not as effective. I did a partial water change after but kept the salt content about the same. Salt actually has benefits for a lot of freshwater fish believe it or not! I highly recommend aquarium salt not just for killing the ich but maintaining a healthy tank. I haven’t had any deaths or ich breakouts following the heat/salt treatment (this was 6 months ago). link to salt I bought- no copper, safe for crays.

If you want to get some of those tannins out and make the water clearer I would suggest using this

https://www.amazon.com/dp/B00K19XZC0/ref=dp_cerb_1?utm_source=share&utm_medium=ios_app&utm_name=iossmf

I use them for my tanks and they work like a charm

The gap between my tank's glass top and the overhead filter isn't big enough for my guy to crawl through, and it's too high in the tank (5 g) for him to reach easily. You may need to cut a different overhead filter intake to size, so that it doesn't reach as far down into the tank for them to climb.

Sorry, that's just a huge pet peeve of mine because it is a strategy typically used by big box stores like Petco and Petsmart to intentionally evade local invasive species laws. (E.g. the Petco where I live sells Procambarus alleni as "blue lobsters" because they are trying to get around the fact that the entire family Cambaridae is illegal to own in Washington state… something I found out AFTER I got my as-it-turns-out-illegal-to-own crayfish.) Lobsters are the family Nephropidae, which are only marine.

I think you should buy at least a 10 gallon (20 gallon long is MUCH better) + an Aquaclear 20 or 30 (depending on what size tank you get) + a pre filter sponge like this: http://www.amazon.com/Fluval-A1387-EDGE-Pre-Filter-Sponge/dp/B002LL32RY/ref=sr_1_2?ie=UTF8&qid=1413430808&sr=8-2&keywords=prefilter+sponge

That's what I do on my RCS tank and my baby RCS are much smaller than your crayfish and they have no problems, plus that filtration is adequate.

I know it seems big given your cray's current size, but as an adult they will get much bigger. My bud was 10 inches (counting claws) when he died.

And then, again, the API Freshwater Master Test kit… and please do look up information about the nitrogen cycle! /r/aquariums has good info in their sidebar.

https://www.amazon.com/Fluval-A6586-Bottom-Feeder-Granules/dp/B071NMW1V3/ref=mp_s_a_1_4?keywords=fluval+bug+bites&qid=1550763884&s=gateway&sr=8-4

This?

And I know it's a crayfish, that's why I posted on /r/Crayfish. I only called it a "Snow White Lobster", because everywhere online I'm finding it, it's under that name. Even within this sub. Sorry if I'm wrong. :(

i live in mississippi where ill be fishing and trapping is in good swampland for the area if theres crayfish in my city this is where they are every single catfish iv caught lately stomach was full of them

https://www.amazon.com/Eagle-Claw-Crayfish-Trap-9-Inch/dp/B0084EGQ5M/ref=asc_df_B0084EGQ5M/?tag=hyprod-20&linkCode=df0&hvadid=312061152211&hvpos=1o1&hvnetw=g&hvrand=956419618236944674&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1020784&hvtargid=pla-449856091811&psc=1&tag=&ref=&adgrpid=62138615036&hvpone=&hvptwo=&hvadid=312061152211&hvpos=1o1&hvnetw=g&hvrand=956419618236944674&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1020784&hvtargid=pla-449856091811

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this is the kind i got i bought 3 i was told later i should have gotten the square ones but i didnt think they were worth it being they were cheaper and larger ugh i hope i can at least catch 3 pounds within a day of my traps

i was told the cone traps r better for moving creeks rather than still water near swamps im guessing ill put 2 traps in the swamp parts and 1 in the creek near some rocks near the bridge and depending on which has the most ill then put the rest in that area i plan t check them every 1.5 hours while im fishing ill fish 4 hours then leave the cages over night and comeback to check the traps again