Labels:bulletin board | dialog box | door | person | reckoner | sky | stairs | web site OCR: The gravel should be higher in the rear of the tank sloping downward towards the front height of r the rear and the front WlI. provide enough slope t.c cause was tes to accumulate at the front, where they can easily be removed by siphon dip tube This will not apply you ins tali ing an under qravel filter You will need approx imatelv two pounds cf gravel to each gallon of water approximately
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