Tank has been set up for about 9 months, parameters are pH near 7.8, ammonia and nitrites 0, nitrates 20-40. Tank is running a whisper 60 (with filter floss, sponge, and ceramic bio-media, no carbon) along with a generic power head sponge filter, I am also running a small UV sterilizer. Tank is stocked with 15-18 ghost shrimp, 2 dalmatian mollies, 2 dwarf yellow mollies, 2 bumblebee platys, 12 cherry barbs, 3 otocinclus, and about a dozen assassin snails. Water changes are weekly, 40%. Fertilization is done 3 times weekly flourish complete, soon to change to EI. Substrate is flourite with no root ferts (soon to add ferts). Plants include 2 adult amazon swords, 2 juvenile amazon swords, about a dozen crypt lutea, 2 bronze wendtii and about 6 sagittaria and 5 small water sprite. Lighting is dual 36" t5 NO.
Symptoms of possible anaerobic areas include poor growth of plants near suspect area, die off of nearby crypt lutea, and uprooting of water sprites. Uprooted sprites have brown/black roots that are very short and appear poor in health. I have minor BBA, the shrimp seem to have helped with it as it was drastically reduced when I added the shrimp (it used to cover absolutely everything) in addition to quite a lot of standard run of the mill green algae.
I no longer have cardinal plants in this tank but they look like this:
I don't think I left out any details, can't do pictures right now as its a bit too late but ill try to get some up tomorrow. I'm not worries about the algae issues right now, I already have methods in motion to address them later. I'm only concerned with the plants uprooting.