okay so i just built a ATS to help with my algae and i read somewhere that you need a pump around 35gph for every inch of screen width. i have a 12 inch screen so i got a 420 gallon pump. i hooked it all up and i just think that the flow is to much i dont know it it is or not! i have the pump turned all the way down now so if its to much ill just get a ball valve or something but any suggestions will help please and thankyou! and i will post a link here to youtube to a video im uploading to see the water flow! you may not be able to see it the best but you can somewhat see it. i just think the flow is too much for the algae to grow but who knows ive been wrong before! thanks in advance.