What is he allergic to? If he's allergic to dust, or cotton, or something that flies around in the air then yes. Hepa filter is great at doing that. But if he's allergic to something like peanut butter.. then no.
Hepa vacuums use a special type of air filter, and water filter vacuums filter the dirt and dust through water to keep it from being re-released into the air. There is still allot of debate on how good they actually work.
If you are looking for someone to come and clean out your air ducts to help reduce your allergies, there are many companies that offer such services such as Lowes.
An air duct cleaning service may help with allergies. It would depend on the chemicals they use to clean the vent. The best thing to do would be to install a HEPA filter over the vent to trap the irritants.
Local honey is theorized to help with allergies when taken every day by exposing the body to local pollens until the body gets "used to" them. Little scientific research has been done into how well this actually works, however.
you get someone to help you set up your bowl
It is supposed to help with allergies
there is somekind of detoxication, that can help release all allergies from your body.. google it
Yes you can but it is one of the less common allergies. In fact, bamboo can be used to help allergies.
No, candles are not likely to have any effect on your allergies, unless you are allergic to either the scent or to the smoke, at which point they wil make your allergies worse.
Does someone in your house suffer from allergies or asthma? Although you dust and vacuum on a regular basis, these methods do nothing about the dust and allergens that are floating in the air. Setting up a HEPA air filter, however, will help to remove these floating particles and make the air easier to breathe. Many HEPA air filters are quite reasonably priced, with replaceable filters that should be changed about every three months. Today's models are quieter than ever before and don't take up much space.
Water changes are the only way to have an immediate effect. If you can get some used filter media from someone and add that to your filter it will help speed the 'cycling' up.
Provided Details as to what this filter was used on then perhaps someone can help.