Hey guys. Alright so here's the situation...any help in diagnosing and combating this problem would be great.
So about a week ago my 2hp chillking fan blew out... leaving my UC running warm in the mid to high 70's. Called HI and they sent off a replacement asap, however it wasn't due to arrive for a few days. So I tried getting my hands on some
roots excelurator to introduce some fortifying benes in the hope of warding off any rot. None in town. Ordered it and it ended up arriving 2 days later, the same day as my new fan arrived. Installed the fan and got the coils pumping again, and also added the RE. At this point all that was in the system was 2ml/g canna a+b, 1ml/g
calmag, and a very small amount of rhiztonic.
At this point I was feeling pretty good, all things considered. Chiller back running, benes in the system, and the plants looking better than ever. Well, the next day I get into the shop and check one of my smaller plants for root mass, to see how it was progressing and noticed some slimy brown, just a little, on its roots. Picked up one of the bigger plants with larger root mass and holy hell, my stomach dropped. I immediately thought it was pythium/root rot from the warm temperatures over the previous couple of days. Seemed somewhat suspicious however how fast it seemed to have come up. Unfortuantely I cant say for sure that it all happened over night. I've barely been keeping head above water by doing all that needs to get done at the shop and my other 2 jobs, so i would frequently check the smaller ones to see how the roots were progressing, but only occasionally had been looking at the bigger ones. That being said, I can confidently say that all of this happened within 3 days time maximum, with a potential overnight outbreak.
I decided that the best thing to do would be to add a concentrated solution of 29% h202 at 6ml/g to each of the epi's and let it go overnight. I filled the systems up very close to lid to ensure that all roots were submerged, added the diluted h2o2, and returned the next day. The next day (today) I did a full flush of both 32 dbxl's and the 16 dbxl, and got rid of essentially all of the base nutes and old water - around 600 gallons. I refilled them each individially from the tallboy as I was pumping out the old stuff, and filled the buckets about an inch above the base of the net pots. I added more h202 at the same dosage, renuted with base nutes (2ml/g) and added
calmag (1ml/g).
After all of this was done and I finally had a second to try and do some more reading...I came across this brown algae shit. now i'm wondering if what I have is actually algae coating the roots, rather than pythium. I have ordered physan 20 from the states and am waiting for that to arrive, but I'd love to hear people's thoughts on what this is. I wish I had better pictures, but hopefully someone can identify it from these.
Many thanks. BCb