im new hear and learning i have built a scrubber its in the sump 14 wide 20 tall reo pump 1700 the flow is about 490 witch it calls for it has two spot lights may need more they are 90 watts and rated as 26 watts 1200 lumes 6500k about 4 inchs away been on 24-7 for week nothing growing yet the material was ruffed up hole saw just try to fighure out if need more light or flow thanks