After a major aphid infestation during my first indoor growing season I cleaned my TG and let it rest. Then tried to germinate seeds which did not go well So my TG sat empty for months. A few weeks ago, new seedlings were ordered and planted in the TG outdoors. Today I discovered aphids on some of the plants. Many of the seedlings have died. Feeling discouraged, especially as my 1st outdoor growing season was successfu. Have need oil and insecticide soap. Any thoughts on how to best eradicate these pests for good? When to order and replant new seedlings? Thanks for your help!