Gelato DWC SCROG (first hydro grow)

Not much except steady growth and stable ph/ec/ppm until end of the week... the pump feeling the chiller started making noise so I pulled it out of the res and disassembled. The vertical tube was slimy with brown residue and had some on the walls as well. Fearing rot and expecting sludge on air stones I dumped the res and was surprised how good everything looked. Roots were feeling lively and firm and developing into a decently sized root ball. Which tangled up my air lines. Those were disconnected and moved to the perimeter of the res rather than directly underneath the plant as the goal is to not have stagnant water and keep the res O2 rich. The perimeter of the tank seems to not have as much circulation as I would like and hope moving stones will help. The slime! So im positive it isn’t brown slime algae as it was just a light residue on a few surfaces and roots are in good shape. I am going to attribute this to vigorous aeration plus the dunk I put in a media filter bag. Plus the rotting corpses of the fungus gnats which have since disappeared with dunk and BT spray on hydroton. I used a harbor freight 1.25g sprayer to wash walls and roots and drained again before filling with new solution (I’ll include that in next week so issues will be tied to that). This is the first res change IN A MONTH and could have gone much longer if not for needing the dunk and BT. Mind you this is also with zero ph buffering, just top off with water so I’m going to say torus hydro is working well!