Advise on fermentation status

[Armando572]

I am currently fermenting an IPA, the original gravity was 1.059, after 3 weeks fermenting is at 1.033. It is been having the same gravity for the past two weeks. I made a 10 gallon batch that is divided into two fermentation buckets. It started fermenting at a 65 degrees Fahrenheit, after a week we increased the temperature to 68 degrees. We used 3 packages of safale-us 05 yeast. When I opened one of the fermentation bucket that contains half of the beer it has a white substance floating on the top and the other half it looks the normal beer color. I attached the batch pictures. I am wondering if the fermentation has gone wrong, if there was a mistake or if it simply suppose to look like that. Any suggestions would be much appreciated.

 

[BigFloyd]

That's not out of the ordinary.

How are you measuring gravity? Refractometer or hydrometer?

 

[Armando572]

Refractometer

 

[g-star]

Refractometer

Are you correcting for alcohol content? Direct readings are not reliable post-fermentation.

 

[Yooper]

Refractometer

Run and check with a hydrometer. The beer is much lower than 1.030. Unfortunately, that one bucket looks like it has a lacto contamination, though.

 

[BigFloyd]

A refractometer is pretty darn useless once fermentation starts unless you run the numbers through a correction calculator.

I bottled a batch a few days ago that finished at 1.010. Just for grins, I checked it with the refractometer - 1.027.

I defer to Yooper about the probability of infection in the one photo. Also, I was wondering where the krausen ring was on the second photo.