Hey guys, we need so help. We have a 20 gal tank that has been up & running for 3 years, and just got back from a 5 day vacation. Sadly, when I went to feed our fish this morning all but two of them were dead We removed the bodies, did level tests (even though it didn't give a lot of new info since decay had happened), set up an emergency tank and put the two platies in it. We had completed a 25% cleaning/water refill & testing a couple days before we left and everything was normal for our tank (ph: 7.6 ammonia: b/t 0 & 0.25 nitrites: 0 nitrates: 20) Not perfect, but we never have been able to keep nitrates down. Our question is how to we clean our plants (if we need to) since there was several dead fish in the water for at least 1 day if not longer. The plants we have: java fern, amazon sword, a moss ball, a huge anubias. Plus few chunks of driftwood. Do we need to clean these while waiting to see how the two survivors do? If we do need to clean them, what would ya'll recommend for us to do so?