Help! My Clown Pleco...

I woke up this morning to find my clown pleco on the bottom of my tank not moving. Usually, he is on the side of the tank or in a corner somewhere. I thought he already had passed but when I used the net he moved over. I have had him about a week and up until this morning, everything has been fine.
It is a newer tank, but I constantly check the levels and they're fine. Every other day I do between a 25-50% water change. It is a 20-gallon tank, where there are 6 zebra danios in the tank as well. The only thing I have noted is that the danios eat his sinking pellet. I added bloodworms to their diet and that seemed to stop that issue. However, I have not seen him take any interest in his food. I don't know if this is the issue or something else.

Tank

• What is the water volume of the tank? 20 gallon
• Does it have a filter? Yes
• Does it have a heater? Yes
• What is the water temperature? 80degree
• What is the entire stocking of this tank? (Please list all fish and inverts.) 1 clown pleco and 6 zebra danio

Maintenance

• How often do you change the water? every other day
• How much of the water do you change? 25%-50%
• What do you use to treat your water? API Stress Coat, API Stress Zyme, Tetra AquaSafe plus, proper pH7.0
• Do you vacuum the substrate or just the water? vacuum

Parameters

• Did you cycle your tank before adding fish? 1 week
• What do you use to test the water? API 5 in 1, API Ammonia Test Kit
• What are your parameters? We need the exact numbers, not just “fine” or “safe”.

Ammonia:
Nitrite:0ppm
Nitrate: 0ppm
pH: 7.0

Feeding

• How often do you feed your fish? 1/day
• How much do you feed your fish? 1 small pinch of flakes and 1/4 pellet
• What brand of food do you feed your fish? TopFin Flakes, Algae wafers
• Do you feed frozen or freeze-dried foods? 1/4 cube of frozen blood worms, first time 2 days ago

Illness & Symptoms:

• How long have you had this fish? 1 week
• How long ago did you first notice these symptoms? 2 hrs ago
• In a few words, (more room for details below) what are the symptoms? not moving on own, on bottom of tank
• Have you started any treatment for the illness? No idea what to do
• Was your fish physically ill or injured upon purchase? NO
• How has its behavior and appearance changed, if at all? usually it is holding onto the side of the tank, and is actively holding onto something

 

Is it wobbling around? It might have Swim Bladder syndrome, or some assortment of those words. Is it rubbing it's skin on the material, or just staying close. If you can tell us these things, (extra/more is always better,) we can see if it is an infection, sickness, etc, and tell you what to do.

 

Does it have wood ?
Nitrates 0 ??????

 

If the danios are eating its food then what I do is wait till the lights are off to feed him that way the danios don’t get to it first.

 

Clown Plecos are wood-eating plecos. This is one species where you do not want to feed too much protein.

Parameters appear fine.