just got my first bigggg tank.. well not that big but a 90 gallon i got it used for 300 for filter gravel stand 2 lights with 4 extra bulbs and heater...everything i need .. i saw it up and running yesterday and it looked great!... well today i filled it up.. and it is dirty brown water now
.. will it settle or should i empty the tank wash/change the gravel? if it clears up ill gravel vacuum it.. its only been 20 minutes so should i be so discouraged?