aluminum can be isolated from a molten mixture of alumina and cryolite by passing an electric current through the melt.
Betta can survive OK in temps between about 70 and 85, but middle of the range, 75-80 is goodFeed them one of the good pellets or flake foodThey dont actually need betta food as their natural diet is the same as many other small carnivorus fish like guppies and gouramiOccasional treats like bloodworms and brine shrimp are good35l tank is a sensible size and a small sponge filter is OKThey are not a particualrly messy fish, so dont need powerful filtering, and dont like strong currents anywayIan
How big are the tanks? A larger tank is easier to keep at a steady temperatureThey like a tempof about 75-80 FBettas can get used to cooler temp's, but less than 75 isn't good for themIt stresses them and they get ill easierIt's the fluctuating temps that really bother them, if you can keep it more steady it helpsDepending on the size of your tank you can get a heater, mini-heater, or external heater (it attaches to the outside of the tank)I wouldn't trust a heating blanket Check around, both because prices vary, and also to learn what will work best for your setupGet a reliable brand! You don't want the heater to not work when it should, or stay on when it shouldn't.
Definately not good for bettas! All tropical fish need a constant steady temp in the mid to upper 70's and it is bad when it goes up and down by more then a degree or two within a 24 hour periodDo not put a heating blanket around the bowl! it will cause the temperature to spike and you wouldn't have to much control over that, you could end up killing your fish like thatDepending on how big of a fish bowl they are in you can invest in a small 7.5 watt heater that will raise the temp by a few degrees to keep it warmer but not get to highPretty sure I've seen them on dr.foster's website.
bettas are considered to be a hardy tropical fish and keeping their tank temp around 75F to 80F is ideal but they can live between 70F to 82F with close observation at the extremes to make sure they don't develop any illnessesfor about $25 dollars you can pick up a small 5 gallon heater (this works on smaller bowls) which will help keep the heat constant and is meant for use around waterwith a small heater there is also a way to control how warm you make the tank wateri'm not sure what kind of heating blanket you have but it might only have an on/off function and don't want to boil your fishit would be a good idea to get a thermometer too so you can monitor the temp every day it's great that you're thinking of your bettasso often people think they can do just fine in cold water and then don't understand why their fish are getting sick and have digestion problems!
Alumina (also known as aluminum oxide) is Al2O3 which means that it has aluminum ions in it (it has two Al 3+ ions and three O 2- ions)When you pass an electric current through it you are 'reducing' (reducingadding electrons to) the Al 3+ ions to make Al metal (has no charge)In conclusion since you started with Al 3+ ions and ended with Al 0 metal, this is a chemical changeChemical change: you fundamentally change the chemical composition of your system- i.echange the structure of a molecule, change the oxidation state or charge of any atomThings to look for: a compound is burned, gas or heat being released by combining chemicals, color changes, electricity is added or released, the ions change in chargePhysical changes: the chemical structure is the same but the material is changed in shape- the material is deformed in some way but not changedThings to look for: things are mixed do not interact, something is dissolved, melted, frozen, squished, boiled, cut into pieces, or powdered.
