It is not clear why you think you crashed your cycle. Certainly cleaning your filter with chlorinated water can do that (though depending on your media, even this will leave much of the bacterial population intact, and even if there is a problem it can quickly balance out again). But this will happen exactly as much if you change out 70% of the water or 20% or whatever...the bacteria don't live in the water column, they live on surfaces and most importantly, the huge surface area of good biolgical medium (like Matrix) in your filters. Remember that the cycle is fish produce ammonia, and bacteria consume it as it is produced, so there is no ammonia left in the water. These bacteria excrete nitrite, which a different kind of bacteria consume as it is produced, so there is no mitrite left in the water. These bacteria produce nitrate, which we generally remove/dilute with water changes (since plants, even if present, consume it but generally are enough given our fish load vs. plants, typically, and the bacteria that consume it are anaerobic and generally our set-ups don't support it enough.
A crash of the cycle is basically the bacteria dying. So the ammonia doesn't get consumed and ultimately converted into relatively innocuous nitrate. Ammonia is very toxic to fish so if your fish seem comfortable then it is very unlikely that you have a problem that needs action (meaning it it does not sounds like you have ammonia or nitrite, which would distress the fish greatly). In any case, test your water, but in the meantime I would just wait for the cloudiness to clear and use your regular routine.
Great looking tank, by the way!
