3 gallons per inch for fish over 3 inches.
													
																	Make your own fish tank. 
									
	
		
	
																	Building your own fish tank is not only very rewarding but can save you a pretty penny as well. 
																	It disrupts the balance of the tank and is harmful to your fish. 
																	I d recommend a 10 20 water change weekly depending on the size of the aquarium and if possible remove the decor and give it a quick wipe down. 
																	Not only is it a gratifying experience but you can make a fish tank that is customized to fit a specific area. 
															
													
									
	
		
	
																	Building a fresh or saltwater do it yourself diy aquarium can be fun as well as challenging. 
																	We re going to assume we want to build a 120 gallon tank with dimensions of 48x24x24 in inches. 
																	Use this materials list pre assembly instructions and complete step by step instructions to construct a 55 gallon glass aquarium with 1 4 inch glass. 
																	As a general rule of thumb most people will say one gallon per inch of fish at minimum for fish under 3 inches. 
															
													
									
	
		
	
																	While you can hypothetically build a fish tank of any shape these instructions are for a square or rectangular aquarium. 
																	I never do anywhere close to a 100 water change. 
																	It may seem very complicated but in reality if you are armed with patience and motivation there isn t an easier task.