Freshwater tank problems

Question
I was reading some of your responses to others, and I thought you might be able to help me. We bought a 10 gallon tank, set it all up, put in 6 danios and a pleco. The aquarium told us to bring in a water sample in 4 weeks to see how things were. After the first week I noticed the tank getting cloudy, by 2 weeks it was really cloudy, so I brought in a water sample early. I was told to do a 50% water change, add water conditioner and bio-boost as in start-up and check back in 2 weeks when the cycling should be about done (they didn't write the results for me). Brought in another sample at 2 weeks, this time I was told the ammonia was much too high (from overfeeding on my part)-past the 6.0 on their charts, 0 nitrites, 40 nitrates, pH about 7.4. I was told to do a 50% water change again, feed fish once a day and come back in a week. I did as told, water cleared up significantly. (And I learned to feed only as the fish ate-not just a pinch all at once as the fish store advised.) The next week's sample, which was today, came back with 0 ammonia, 40 nitrates still, 10.0 on nitrites, and the pH is something over 8.4. All I was told was to do a 20% change, add bio-boost everyday, and bring in  another sample in a week.

Despite everything the fish seem to be doing well, they go super fast right after a water change, but otherwise well, swimming happily.

I'm just a bit concerned that the fish store seems confused with the results each time and after shrugging their shoulders they keep telling me to do the same thing, yet I'm getting major fluctuations. Not sure if I should even keep going back to the same store. Any advice would be greatly appreciated. Thanks for your time!!!  

Answer
Hi Nickole,
It sounds like things are pretty much under control.
Things will fluctuate a lot in the first few months.
I wouldn't add any more bio boost, and I would just do 50% water changes every week for as long as you have the tank.
Get yourself a good test kit and test water daily for a week, then test water each week to make sure ammonia and nitrites stay at zero. NitrAtes don't matter too much.
You can even feed fish every other day....They should be fine. I think you are doing just fine.