Im builiding a 8ft x 3ft x 2ft Indoor Cichlid pond for my Severum, Jewel, Gouramis, Silver Dollars and other fish that i have in a 45 gallon tank. It will have more fish eventually but anyway my question is What Filter and what heaters should i use for this pond. Substrate will be a 2inch deep sand ( or whatever is best to use gravel whatever) Im on a budget and am looking not for a cheap filter but a filter thats worth the price and can get the job done right without me leaving without an arm or a leg. Thanks, Justin