It is best Laurie to just reply to the last post given so we can follow it better..

MY concern here is::
1. ARE THEIR ANY FISH IN THIS TANK NOW??
As you are cycling this tank, and I assume that as you cleaned the gravel and it is dirty, THAT YOU HVE FISH.. right??
2. YOU dont' say how big this tank is.. Hard to help you figure out your water in/out if I dont' know the gallons of your tank.. Liters is fine, I can figure it out...
3. WHEN did you first set the tank up?? AS in how many weeks are you into this cycle??
4. IS this a python that is connected to your sink fauset OR did you just use a regular siphon to clean the gravel with?? To much gravel in a tank wil hold a lot of waste/uneaten foods.. I only keep 1" of gravel in my tanks due to this reason.. AS I have Emperor Filters that have BIO wheels to keep my good bacteria in the tank, a lot of gravel is not necessary to maintain a good bacteria bed.. ANY other brand of Hang on the back filter WITH Bio wheels is great to use too..
Using a gravel cleaner can be fustrating to the max on the first few attempts.. AS you seem to have to much gravel here. I would remove it to at least 2" and then it won't be a chore to get the gravel cleaner faster and less water out.. YOUR tank was really dirty so this is why it is cloudy and the filter should remove the floating debri in a few hours BUt most wil settle back into the gravel.. THIS also tells you that you need to clean the GRAVEL MORE OFTEN BUT NOT MORE THAN ONCE A WEEK..
THE filter also needs attention here.. so clean it every TWO WEEKS UNTIL YOUR TANK IS CYCLED....
I mean take it to the sink and clean it out good... DON"T just add in NEW FILTER PADS.. CLEAN THE BOX OUT!!
Fish stores mean well but they dont' tell you the whole story... NO fish, dont' touch the water for 3 weeks.. WITH FISH, YOU are going to have to monitor the AMMONIA, NITRITES daily until you see a reading, AMMONIA reads first, and do a 20% water change of your tank water volume.. (tank size x .25=) This much water out/in.. I round if off to the nearest even number for dechlor/salt measurements..... IF it says 12.5 gal, then do 10 gal out/in.. 13.5 = do 15 gal out/in...
DID you use any bacteria helpers LIKE CYCLE??
High Ammonia reading of .2 can kill your fish.. BUT the reading wil go up to .5 and this is dangerouse big time!! WATER CHANGES ARE THE BEST AND ONLY WAY TO KEEP THEM DOWN!! EVEN if you have to do one every other day!! BUT only do 20% of your tank size...
FEEDING ONCE daily to EVERYOTHER DAY wil help you here.. but not guarantee high AMMONIA levels..
WHEN the AMMONIA GOES DOWN TO 0ppm, then the NITRITES are going to do the same!! Same method as above.. YEA welcome to cycling a tank....

BUY your own LIQUID test kits.. they are not that expensive and you need to do this daily to every other to know where your tank is at... AS this tank is like into a good cycle, then your ammonia may be already at 0ppm and your nitrites are peaking now.. Best to do a water change every 3 days, watch your feeding and get the test kits.. here is what you need NOW.. AMMONIA, NITRITE.. Nitrite needs a timer so be aware of that.. make sure the ammoina one is INSTANT..
AND Dan though his post was long... :toothy9: