Does anyone know why the tank been cloudly through the whole cycle? Could it be to much ammonia?
I am not sure what a 60 gallonsponge filter is but I am sure that I would not attempt to filter a 60 gallon aquarium with a sponge filter if you see what I mean.
I would use a more efficient powered filter.
If you add a filter to your setup it should colonise with bacteria and add to the biological filtration as it matures but this can take time, I think probably several weeks.
If ammonia is present now your fish are in danger from it's toxic effects now.
What would I do?
Presented by this situation I would immediately take the fish out and put them in a safe environment.
I would then establish a good quality powered filter appropriate to the size of the tank.
I would test for ammonia and nitrate to ensure that wastes are being processed by the filter before returning the fish gradually in stages.
I agree to add in a power filter in that tank. A sponge filter is not enough.
Make sure to keep your ammonia and nitrites together under 1.0 with large water changes, dose prime for the full volume of the tank daily and in any cycling tank.
That's great, good filter.
Special blend just reduces organics, it is a bottle of hetertrophic bacteria, land bacteria the kind that decomposes fish food, poop etc. It won't populate your tank with additional nitrifyers. Their niteout product will and would be good to use while cycling. Neither product will detoxify the ammonia and nitrites you have though.
What water conditioner are you using? I'd switch to Prime or Amquel Plus or similar that will detoxify ammonia and nitrites.
Oh, on their website they state it does not remove chlorine or chloramines. Do you have a water conditioner that does? That's why I'd also pick up some Prime.
Also, because you're cycling with fish, any ammonia or nitrites are toxic. Prime will help detoxify them but your biological filter can still utilize them. It just keeps your fish safe while cycling.
Special blend is not your nitrifyers, its misleading marketing. It just occurred to me this is why you have ongoing cloudiness also, its the bacteria you're adding into the water column every week. Your tank will develop those same bacteria all on their own. Their nite out product does have true nitrifyers (autotrophs) and also the organic removers like special blend. You'd be better off getting a bottle of Seachem Stability or Aqua Vitro Seed or Tetra Safe Start Plus which are true nitrifyers to seed your filter. It won't make your tank cycle any faster (this product I mean). When you have an over abundance of heterotrophic bacteria they can help reduce some ammonia and nitrites but think of it this way, it takes literally millions of that bacteria to do the same job that one nitrifying bacteria can do.
Hope that all makes sense