Gekko,
You move to secondary before dry because the rate of fermentation has slowed considerably, so the wine needs to be protected from oxygen. To start secondary, you typically rack wine to a carboy; you keep the wine from oxygen by installing an air lock. Yes, getting the wine off the gross lees is another reason to rack to secondary.
IMO, you don't really need to top off in secondary; only after you rack from secondary (after all fermentation is done). During secondary, although much slower, there is still CO2 bubbling out of the wine and it forces out any air from the carboy.
After your 28 day point, before topping off, you stabilize and degas. Once degassed, you add your clarifier(s), top off and start the clearing stage.
Do topping off after wine is in the carboy and clearing. Top off so that wine is above the shoulders of
the carboy and up into the lower part of the neck of the carboy. Use a like wine to top off if you have it. If not, use a merlot if your wine is a red.
You move to secondary before dry because the rate of fermentation has slowed considerably, so the wine needs to be protected from oxygen. To start secondary, you typically rack wine to a carboy; you keep the wine from oxygen by installing an air lock. Yes, getting the wine off the gross lees is another reason to rack to secondary.
IMO, you don't really need to top off in secondary; only after you rack from secondary (after all fermentation is done). During secondary, although much slower, there is still CO2 bubbling out of the wine and it forces out any air from the carboy.
After your 28 day point, before topping off, you stabilize and degas. Once degassed, you add your clarifier(s), top off and start the clearing stage.
Do topping off after wine is in the carboy and clearing. Top off so that wine is above the shoulders of
the carboy and up into the lower part of the neck of the carboy. Use a like wine to top off if you have it. If not, use a merlot if your wine is a red.