On My 2ft tank, I used classic 250 and felt the same, and with the short rain bar supplied is another factor for poor flow, result, algae at dead spots. I used pro 3 for a month and everything sorted out. Its nice to see the plants swaying gently. I reduced the flow at the valve and custom made a full length rain bar. All issues solved...
Sent from my HUAWEI GRA-UL00 using Tapatalk