I am preparing to make some significant changes to my aquascaping. I have a 37 gallon tank that is now moderately planted. I plan to double the number of plants this weekend, which will probably mean a substantial disruption to the substrate. I am wondering whether I should remove all the fish before I begin disrupting the flourite gravel or should I just be careful not to stir it up too much? I am thinking of removing 20% of the water to make the planting go easier, otherwise I have to submerge my arm to my armpit to plant in the tall 37 G. I plan to turn off the outside power filter. Any recommendations.