I have never previously had major problems with algae but for the last 6 weeks i have had major problem with my pressurized CO2 setup, it has been sorted now (thank god!) but the low and irregular levels over the 6 weeks has reeked havoc, plant growth has drastically reduced and despite less lighting and ferts BHA has taken over my HC 'cuba', Vallis Nana, java moss and bleheri sp. its now starting to take hold on my barteri nana and echindorus sp. I have been removing the algae as best as possible and i've increased the size of my water changes, regular 25ppm co2 has been re-instated for the last 5 days but there is still no improvement, this is the reason for my 'vacuming EcoComplete' thread and ultimately my plans to start a new scape. But before i go ahead with those plans i wanted to check if anyone new any tricks to elimate the damned BHA, i recently heard of a yellow claw shrimp that apparently eats BHA? Can anyone help?