I've been trying new things for this problem. The problem is rbp aren't picky. Lowering the temp won't work till you get in the lower 70s. Water changes with warm or cold water won't stop them, its still fresh clean water either way. More decor & ground cover helps, less spawning sites. But to be effective you bout have you cover bottom with decor. Barebottom tank will probably work the best to stop them or at least slow them down. Could add a pleco or two for help cleaning out eggs & nest sites.