Does protofloc alter hydrometer readings?

[stee41]

Hi fellow brewers,

I have made a batch of Orfys Hobgoblin today, it went really well and all to plan but my SG reading at 24c came out at 1042 after the boil, I have a 20c calibrated hydrometer, I run my figures through the online calculator and it changed the SG to 1043 the only thing I done different was to add a protofloc tablet during the last 15mins of the boil..does this make a difference?

RECIPE BELOW..

Hob Goblin

Brew Type: All Grain Brewer: Orfy
Batch Size: 23.00 L Boil Volume: 30.29 L
Boil Time: 60 min
Brewhouse Efficiency: 75.0 %

Ingredients for Mash
4.80 kg Marris Otter Pale (2 Row) UK (3.0 SRM)
0.25 kg Caramel/Crystal Malt - 60L (60.0 SRM)
0.20 kg Cara-Pils/Dextrine (2.0 SRM)
0.15 kg Chocolate Malt (450.0 SRM)
Mash In: Add 14.09 L of water at 78.2 C
90 min - Hold mash at 69.0 C for 90 min
Add first wort hops to boiler at start of sparge
15.00 gm Styrian Goldings [5.00%] (60 min) (First Wort Hop)
15.00 gm Fuggles [4.50%] (60 min) (First Wort Hop)
--Boil for 60 min
15.00 gm Styrian Goldings [5.00%] (30 min)
15.00 gm Fuggles [4.50%] (30 min)
1.00 tsp Irish Moss (50 min)
15.00 gm Fuggles [4.50%] (60 min)
15.00 gm Styrian Goldings [4.50%] (60 min )

-- Cool wort to fermentation temperature
-- Add water (as needed) to achieve volume of 23.00 L
-- Siphon wort to primary fermenter and aerate wort.
-- Add Ingredients to Fermenter
Amount Item Type 1 Pkgs Nottingham (Danstar #-) Yeast-Ale
20/12/2006 Measure Original Gravity: ________ (Estimate: 1.052 SG)
20/12/2006 Measure Batch Volume: ________ (Estimate: 23.00 L)

 

[Sean_Mc]

No simply put, your OG should be taken after the boil and for me when the worts cooled to below 25c, then adjust using the calculator.

Obviously adjust when sparging to reduce tannin extraction you don want liquid below 1008, but Irish moss or its refined chemicals wont affect the gravity.






....................bet there's an exception I've totally missed :whistle: