I have a 90 gallon with 1 oscar 1 green terror and 2 parrots ( all small right now) , they are messy eaters. I have a eheim 2075 and a penguin 350b hob water is crystal clear . When these fish get bigger the bioload will increase do you think I have enough filtration? Most of you like to over filter , I found some great deals online for fx5 (239 plus free shipping). Thanks for your help.